Remove a few tests from multinode gate

The multinode gate is reserved for tests that require multiple nodes
like server migration tests. It is also used for slow-running
tests that take a while to execute (20-30+ seconds) to better
parallelize tests in the gates.

However, 3 tests currently meet neither of these criteria and are
hence being moved to the voting gates:

  * test_create_security_group_for_server [6.492102s]
  * test_remove_security_group_from_server [6.525612s]
  * test_volume_upload_public [4.558483s]

Change-Id: I24c65839692264f30a1494c051eec5fb72eb78a6
Source: http://logs.openstack.org/68/494368/12/check/gate-tempest-dsvm-patrole-multinode-member-ubuntu-xenial-nv/32ae39c/console.html
diff --git a/patrole_tempest_plugin/tests/api/compute/test_security_groups_rbac.py b/patrole_tempest_plugin/tests/api/compute/test_security_groups_rbac.py
index a28ddb9..36d8c2c 100644
--- a/patrole_tempest_plugin/tests/api/compute/test_security_groups_rbac.py
+++ b/patrole_tempest_plugin/tests/api/compute/test_security_groups_rbac.py
@@ -61,7 +61,6 @@
         self.rbac_utils.switch_role(self, toggle_rbac_role=True)
         self.servers_client.list_security_groups_by_server(self.server['id'])
 
-    @decorators.attr(type=["slow"])
     @rbac_rule_validation.action(
         service="nova",
         rule="os_compute_api:os-security-groups")
@@ -75,7 +74,6 @@
                         self.servers_client.remove_security_group,
                         self.server['id'], name=sg_name)
 
-    @decorators.attr(type=["slow"])
     @rbac_rule_validation.action(
         service="nova",
         rule="os_compute_api:os-security-groups")
diff --git a/patrole_tempest_plugin/tests/api/compute/test_server_misc_policy_actions_rbac.py b/patrole_tempest_plugin/tests/api/compute/test_server_misc_policy_actions_rbac.py
index b64eef8..1e48498 100644
--- a/patrole_tempest_plugin/tests/api/compute/test_server_misc_policy_actions_rbac.py
+++ b/patrole_tempest_plugin/tests/api/compute/test_server_misc_policy_actions_rbac.py
@@ -96,7 +96,6 @@
         self.rbac_utils.switch_role(self, toggle_rbac_role=True)
         self.servers_client.inject_network_info(self.server['id'])
 
-    @decorators.attr(type=['slow'])
     @test.requires_ext(extension='os-admin-actions', service='compute')
     @rbac_rule_validation.action(
         service="nova",