Replace the usage of 'admin_manager' with 'os_admin'

In tempest, alias 'admin_manager' has been moved to 'os_admin'
in version Pike, and it will be removed in version Queens [1].

The other usages which also need to be replaced, are listed below:
* manager > os_primary [2]
* os_adm > os_admin [3]
* os > os_primary [4]

[1] https://review.openstack.org/#/c/467852/
[2] https://review.openstack.org/#/c/468036/
[3] https://review.openstack.org/#/c/467605/
[4] https://review.openstack.org/#/c/466991/

Change-Id: If8880565ba6a70b1b1419394f4706fe37cfff1c4
diff --git a/manila_tempest_tests/tests/api/test_security_services_mapping_negative.py b/manila_tempest_tests/tests/api/test_security_services_mapping_negative.py
index 94cb25f..d60b458 100644
--- a/manila_tempest_tests/tests/api/test_security_services_mapping_negative.py
+++ b/manila_tempest_tests/tests/api/test_security_services_mapping_negative.py
@@ -95,7 +95,7 @@
         not CONF.share.multitenancy_enabled, "Only for multitenancy.")
     def test_delete_ss_from_sn_used_by_share_server(self):
         sn = self.shares_client.get_share_network(
-            self.os.shares_client.share_network_id)
+            self.os_primary.shares_client.share_network_id)
         fresh_sn = self.create_share_network(
             neutron_net_id=sn["neutron_net_id"],
             neutron_subnet_id=sn["neutron_subnet_id"])
diff --git a/manila_tempest_tests/tests/api/test_security_services_negative.py b/manila_tempest_tests/tests/api/test_security_services_negative.py
index 7f96ae9..eb871a6 100644
--- a/manila_tempest_tests/tests/api/test_security_services_negative.py
+++ b/manila_tempest_tests/tests/api/test_security_services_negative.py
@@ -81,7 +81,7 @@
         ss = self.create_security_service(**ss_data)
 
         sn = self.shares_client.get_share_network(
-            self.os.shares_client.share_network_id)
+            self.os_primary.shares_client.share_network_id)
         fresh_sn = self.create_share_network(
             neutron_net_id=sn["neutron_net_id"],
             neutron_subnet_id=sn["neutron_subnet_id"])
diff --git a/manila_tempest_tests/tests/scenario/manager.py b/manila_tempest_tests/tests/scenario/manager.py
index 522c3fd..f90f468 100644
--- a/manila_tempest_tests/tests/scenario/manager.py
+++ b/manila_tempest_tests/tests/scenario/manager.py
@@ -749,7 +749,7 @@
             :returns: True if subnet with cidr already exist in tenant
                   False else
             """
-            cidr_in_use = self.admin_manager.subnets_client.list_subnets(
+            cidr_in_use = self.os_admin.subnets_client.list_subnets(
                 tenant_id=tenant_id, cidr=cidr)['subnets']
             return len(cidr_in_use) != 0
 
@@ -797,7 +797,7 @@
         return subnet
 
     def _get_server_port_id_and_ip4(self, server, ip_addr=None):
-        ports = self.admin_manager.ports_client.list_ports(
+        ports = self.os_admin.ports_client.list_ports(
             device_id=server['id'], fixed_ip=ip_addr)['ports']
         # A port can have more than one IP address in some cases.
         # If the network is dual-stack (IPv4 + IPv6), this port is associated
@@ -827,7 +827,7 @@
         return port_map[0]
 
     def _get_network_by_name(self, network_name):
-        net = self.admin_manager.networks_client.list_networks(
+        net = self.os_admin.networks_client.list_networks(
             name=network_name)['networks']
         self.assertNotEqual(len(net), 0,
                             "Unable to get network by name: %s" % network_name)
diff --git a/manila_tempest_tests/tests/scenario/test_share_basic_ops.py b/manila_tempest_tests/tests/scenario/test_share_basic_ops.py
index 835e325..ea79ef2 100644
--- a/manila_tempest_tests/tests/scenario/test_share_basic_ops.py
+++ b/manila_tempest_tests/tests/scenario/test_share_basic_ops.py
@@ -222,8 +222,9 @@
 
     def wait_for_active_instance(self, instance_id):
         waiters.wait_for_server_status(
-            self.manager.servers_client, instance_id, "ACTIVE")
-        return self.manager.servers_client.show_server(instance_id)["server"]
+            self.os_primary.servers_client, instance_id, "ACTIVE")
+        return self.os_primary.servers_client.show_server(
+            instance_id)["server"]
 
     @tc.attr(base.TAG_POSITIVE, base.TAG_BACKEND)
     def test_mount_share_one_vm(self):