Add new group collecting mechanism
diff --git a/cvp_checks/tests/test_default_gateway.py b/cvp_checks/tests/test_default_gateway.py
index b6c74c2..cac5328 100644
--- a/cvp_checks/tests/test_default_gateway.py
+++ b/cvp_checks/tests/test_default_gateway.py
@@ -6,13 +6,11 @@
 
 @pytest.mark.parametrize(
     "group",
-    utils.get_groups(os.path.basename(__file__))
+    utils.node_groups.keys()
 )
 def test_check_default_gateways(local_salt_client, group):
-    if "skipped" in group:
-        pytest.skip("skipped in config")
     netstat_info = local_salt_client.cmd(
-        group, 'cmd.run', ['ip r | sed -n 1p'], expr_form='pcre')
+        "L@"+','.join(utils.node_groups[group]), 'cmd.run', ['ip r | sed -n 1p'], expr_form='compound')
 
     gateways = {}
     nodes = netstat_info.keys()
diff --git a/cvp_checks/tests/test_mtu.py b/cvp_checks/tests/test_mtu.py
index 8d76cef..53d9dba 100644
--- a/cvp_checks/tests/test_mtu.py
+++ b/cvp_checks/tests/test_mtu.py
@@ -6,18 +6,16 @@
 
 @pytest.mark.parametrize(
     "group",
-    utils.get_groups(os.path.basename(__file__))
+    utils.node_groups.keys()
 )
 def test_mtu(local_salt_client, group):
     testname = os.path.basename(__file__).split('.')[0]
-    if "skipped" in group:
-        pytest.skip("skipped in config")
     config = utils.get_configuration()
     skipped_ifaces = config.get(testname)["skipped_ifaces"] or \
         ["bonding_masters", "lo", "veth", "tap", "cali"]
     total = {}
     network_info = local_salt_client.cmd(
-        group, 'cmd.run', ['ls /sys/class/net/'], expr_form='pcre')
+        "L@"+','.join(utils.node_groups[group]), 'cmd.run', ['ls /sys/class/net/'], expr_form='compound')
 
     kvm_nodes = local_salt_client.cmd(
         'salt:control', 'test.ping', expr_form='pillar').keys()
diff --git a/cvp_checks/tests/test_packet_checker.py b/cvp_checks/tests/test_packet_checker.py
index 2556bcf..d85e87e 100644
--- a/cvp_checks/tests/test_packet_checker.py
+++ b/cvp_checks/tests/test_packet_checker.py
@@ -6,12 +6,10 @@
 
 @pytest.mark.parametrize(
     "group",
-    utils.get_groups(os.path.basename(__file__))
+    utils.node_groups.keys()
 )
 def test_check_package_versions(local_salt_client, group):
-    if "skipped" in group:
-        pytest.skip("skipped in config")
-    output = local_salt_client.cmd(group, 'lowpkg.list_pkgs', expr_form='pcre')
+    output = local_salt_client.cmd("L@"+','.join(utils.node_groups[group]), 'lowpkg.list_pkgs', expr_form='compound')
 
     if len(output.keys()) < 2:
         pytest.skip("Nothing to compare - only 1 node")
@@ -44,18 +42,16 @@
 
 @pytest.mark.parametrize(
     "group",
-    utils.get_groups(os.path.basename(__file__))
+    utils.node_groups.keys()
 )
 def test_check_module_versions(local_salt_client, group):
-    if "skipped" in group:
-        pytest.skip("skipped in config")
     pre_check = local_salt_client.cmd(
-        group, 'cmd.run', ['dpkg -l | grep "python-pip "'], expr_form='pcre')
+        "L@"+','.join(utils.node_groups[group]), 'cmd.run', ['dpkg -l | grep "python-pip "'], expr_form='compound')
     if pre_check.values().count('') > 0:
         pytest.skip("pip is not installed on one or more nodes")
     if len(pre_check.keys()) < 2:
         pytest.skip("Nothing to compare - only 1 node")
-    output = local_salt_client.cmd(group, 'pip.freeze', expr_form='pcre')
+    output = local_salt_client.cmd("L@"+','.join(utils.node_groups[group]), 'pip.freeze', expr_form='compound')
 
     nodes = []
     pkts_data = []
diff --git a/cvp_checks/tests/test_repo_list.py b/cvp_checks/tests/test_repo_list.py
index 07f16d0..c29bb7f 100644
--- a/cvp_checks/tests/test_repo_list.py
+++ b/cvp_checks/tests/test_repo_list.py
@@ -5,13 +5,13 @@
 
 @pytest.mark.parametrize(
     "group",
-    utils.get_groups(os.path.basename(__file__))
+    utils.node_groups.keys()
 )
 def test_list_of_repo_on_nodes(local_salt_client, group):
     if "skipped" in group:
         pytest.skip("skipped in config")
     info_salt = local_salt_client.cmd(
-        group, 'pillar.data', ['linux:system:repo'], expr_form='pcre')
+        "L@"+','.join(utils.node_groups[group]), 'pillar.data', ['linux:system:repo'], expr_form='compound')
 
     raw_actual_info = local_salt_client.cmd(
         group,
diff --git a/cvp_checks/tests/test_services.py b/cvp_checks/tests/test_services.py
index 7f04578..be0bc16 100644
--- a/cvp_checks/tests/test_services.py
+++ b/cvp_checks/tests/test_services.py
@@ -6,12 +6,10 @@
 
 @pytest.mark.parametrize(
     "group",
-    utils.get_groups(os.path.basename(__file__))
+    utils.node_groups.keys()
 )
 def test_check_services(local_salt_client, group):
-    if "skipped" in group:
-        pytest.skip("skipped in config")
-    output = local_salt_client.cmd(group, 'service.get_all', expr_form='pcre')
+    output = local_salt_client.cmd("L@"+','.join(utils.node_groups[group]), 'service.get_all', expr_form='compound')
 
     if len(output.keys()) < 2:
         pytest.skip("Nothing to compare - only 1 node")
diff --git a/cvp_checks/tests/test_single_vip.py b/cvp_checks/tests/test_single_vip.py
index 60d1894..d829a1a 100644
--- a/cvp_checks/tests/test_single_vip.py
+++ b/cvp_checks/tests/test_single_vip.py
@@ -6,12 +6,10 @@
 
 @pytest.mark.parametrize(
     "group",
-    utils.get_groups(os.path.basename(__file__))
+    utils.node_groups.keys()
 )
 def test_single_vip(local_salt_client, group):
-    if "skipped" in group:
-        pytest.skip("skipped in config")
-    local_salt_client.cmd(group, 'saltutil.sync_all', expr_form='pcre')
+    local_salt_client.cmd("L@"+','.join(utils.node_groups[group]), 'saltutil.sync_all', expr_form='compound')
     nodes_list = local_salt_client.cmd(
         group, 'grains.item', ['ipv4'], expr_form='pcre')