Fix some tempest deprecation warnings

Saw this recently in a tempest test run:

    DeprecationWarning: Read-only property 'manager'
    has moved to 'os_primary' in version 'Pike' and
    will be removed in version 'Queens'

Tempest BaseTestCase class credential names have changed
from manager->os_primary, admin->os_admin, and
alt_manager->os_alt, so we should start using them.

Closes-bug: #1697588
Change-Id: I44de8046fc983bf6780c310e8db174a5902c2826
diff --git a/neutron/tests/tempest/scenario/base.py b/neutron/tests/tempest/scenario/base.py
index 1e20c74..15a722a 100644
--- a/neutron/tests/tempest/scenario/base.py
+++ b/neutron/tests/tempest/scenario/base.py
@@ -71,7 +71,7 @@
         if not security_groups:
             security_groups = [{'name': 'default'}]
 
-        server = self.manager.servers_client.create_server(
+        server = self.os_primary.servers_client.create_server(
             name=name,
             flavorRef=flavor_ref,
             imageRef=image_ref,
@@ -81,9 +81,9 @@
 
         self.addCleanup(test_utils.call_and_ignore_notfound_exc,
             waiters.wait_for_server_termination,
-            self.manager.servers_client, server['server']['id'])
+            self.os_primary.servers_client, server['server']['id'])
         self.addCleanup(test_utils.call_and_ignore_notfound_exc,
-                        self.manager.servers_client.delete_server,
+                        self.os_primary.servers_client.delete_server,
                         server['server']['id'])
         return server
 
@@ -155,7 +155,7 @@
         return router
 
     def create_and_associate_floatingip(self, port_id):
-        fip = self.manager.network_client.create_floatingip(
+        fip = self.os_primary.network_client.create_floatingip(
             CONF.network.public_network_id,
             port_id=port_id)['floatingip']
         self.floating_ips.append(fip)
@@ -172,7 +172,7 @@
         self.subnet = self.create_subnet(self.network)
         LOG.debug("Created subnet %s", self.subnet['id'])
 
-        secgroup = self.manager.network_client.create_security_group(
+        secgroup = self.os_primary.network_client.create_security_group(
             name=data_utils.rand_name('secgroup-'))
         LOG.debug("Created security group %s",
                   secgroup['security_group']['name'])
@@ -189,7 +189,7 @@
             key_name=self.keypair['name'],
             networks=[{'uuid': self.network['id']}],
             security_groups=[{'name': secgroup['security_group']['name']}])
-        waiters.wait_for_server_status(self.manager.servers_client,
+        waiters.wait_for_server_status(self.os_primary.servers_client,
                                        self.server['server']['id'],
                                        constants.SERVER_STATUS_ACTIVE)
         port = self.client.list_ports(network_id=self.network['id'],
@@ -211,12 +211,12 @@
             LOG.debug('Console output not supported, cannot log')
             return
         if not servers:
-            servers = self.manager.servers_client.list_servers()
+            servers = self.os_primary.servers_client.list_servers()
             servers = servers['servers']
         for server in servers:
             try:
                 console_output = (
-                    self.manager.servers_client.get_console_output(
+                    self.os_primary.servers_client.get_console_output(
                         server['id'])['output'])
                 LOG.debug('Console output for %s\nbody=\n%s',
                           server['id'], console_output)