(WIP) Use dynamic IPv4 network pools for deploy clusters (#18)

*     Use dynamic IPv4 network pools for deploy clusters

    - Use 'config' object as an additional jinja option to load templates
    - Use 'address_pools' from 'config' object in
      virtual-mcp11-ovs and virtual-mcp11-dvr
    - Fill 'address_pools' in 'config' object from fuel-devops manager

*     Use dynamic IPv4 network pools for deploy clusters

    - Use 'config' object as an additional jinja option to load templates
    - Use 'address_pools' from 'config' object in
      virtual-mcp11-ovs and virtual-mcp11-dvr
    - Fill 'address_pools' in 'config' object from fuel-devops manager

* return removed 'test_install_k8s'

* Use 'sed' to replace IP addresses in the models to pre-generated

also, two new environment variables avaliable for mcp11-ovs/dvr:
- SALT_MODELS_REPOSITORY
- SALT_MODELS_COMMIT

* remove temporary env_config.py.bak
diff --git a/tcp_tests/tests/system/test_opencontrail.py b/tcp_tests/tests/system/test_opencontrail.py
index 661b298..9452bda 100644
--- a/tcp_tests/tests/system/test_opencontrail.py
+++ b/tcp_tests/tests/system/test_opencontrail.py
@@ -28,7 +28,7 @@
     """Test class for testing OpenContrail on a TCP lab"""
 
     # @pytest.mark.snapshot_needed
-    # @pytest.mark.fail_snapshot
+    @pytest.mark.fail_snapshot
     def test_opencontrail(self, config, openstack_deployed,
                                  show_step, opencontrail):
         """Runner for Juniper contrail-tests