Rename tenant to project in functional test

Rename "admin_tenant_name" to "admin_project_name" and
rename "tenant_name" to "project_name". These configs have been
renamed in tempest [1], so Magnum needs to adapt the change.

In addition, enable the required devstack plugins in gate hook,
since they has been removed from project-config [2].

[1] https://review.openstack.org/#/c/301167/
[2] https://review.openstack.org/#/c/305475/

Change-Id: I41438cbfaefd9d04d7e73a4f46f5ece1494b349c
Closes-Bug: #1567691
(partially pick from commit b8324f0d72)

doc/source/dev/functional-test.rst

@@ -69,7 +69,7 @@ Here's a reasonable sample of tempest.conf settings you might need::
     test_accounts_file=/tmp/etc/magnum/accounts.yaml
     admin_username=admin
     admin_password=password
-    admin_tenant_name=admin
+    admin_project_name=admin
 
     [identity]
     disable_ssl_certificate_validation=True

magnum/tests/contrib/gate_hook.sh

@@ -17,6 +17,10 @@
 
 coe=$1
 
+export PROJECTS="openstack/barbican $PROJECTS"
+export DEVSTACK_LOCAL_CONFIG="enable_plugin magnum git://git.openstack.org/openstack/magnum"
+export DEVSTACK_LOCAL_CONFIG+=$'\n'"enable_plugin ceilometer git://git.openstack.org/openstack/ceilometer"
+
 if [ "$coe" = "mesos" ]; then
     echo "MAGNUM_GUEST_IMAGE_URL="https://fedorapeople.org/groups/magnum/ubuntu-14.04.3-mesos-0.25.0.qcow2"" >> $BASE/new/devstack/localrc
 fi

magnum/tests/functional/common/config.py

@@ -24,14 +24,14 @@ class Config(object):
     def set_admin_creds(cls, config):
         cls.admin_user = CONF.auth.admin_username
         cls.admin_passwd = CONF.auth.admin_password
-        cls.admin_tenant = CONF.auth.admin_tenant_name
+        cls.admin_tenant = CONF.auth.admin_project_name
 
     @classmethod
     def set_user_creds(cls, config):
         # normal user creds
         cls.user = CONF.identity.username
         cls.passwd = CONF.identity.password
-        cls.tenant = CONF.identity.tenant_name
+        cls.tenant = CONF.identity.project_name
 
     @classmethod
     def set_auth_version(cls, config):