[DO NOT MERGE] Add vendor theme

Change-Id: I8438519bd62fabfcc76d35088f0156e2345dfef1

docker/horizon/Dockerfile.j2

@@ -9,8 +9,7 @@ RUN apt-get update \
 
 {{ copy_sources("openstack/horizon", "/horizon") }}
 {{ copy_sources("openstack/sahara-dashboard", "/sahara-dashboard") }}
-{{ copy_sources("openstack/murano-dashboard", "/murano-dashboard") }}
-{{ copy_sources("openstack/searchlight-ui", "/searchlight-ui") }}
+{{ copy_sources("mirantis-theme", "/theme") }}
 
 RUN mkdir -p /etc/openstack-dashboard /home/horizon /var/www/cgi-bin/horizon \
     && cp -a /sahara-dashboard/sahara_dashboard/enabled/* /horizon/openstack_dashboard/local/enabled/ \
@@ -27,6 +26,8 @@ RUN mkdir -p /etc/openstack-dashboard /home/horizon /var/www/cgi-bin/horizon \
         cp -a /searchlight-ui/searchlight_ui/conf/searchlight_policy.json /horizon/openstack_dashboard/conf/; fi) \
     && (if [ -f /searchlight-ui/searchlight_ui/local_settings.d/_1001_search_settings.py ]; then \
         cp -a /searchlight-ui/searchlight_ui/local_settings.d/_1001_search_settings.py /horizon/openstack_dashboard/local/local_settings.d/; fi) \
+    && cp /theme/local/local_settings.d/_10_set_custom_theme.py /horizon/openstack_dashboard/local/local_settings.d/ \
+    && cp -r /theme/themes/vendor/ /horizon/openstack_dashboard/themes/ \
     && /var/lib/microservices/venv/bin/pip install --upgrade /horizon /sahara-dashboard /murano-dashboard /searchlight-ui \
     && useradd --user-group horizon \
     && ln -s /etc/openstack-dashboard/local_settings /var/lib/microservices/venv/lib/python2.7/site-packages/openstack_dashboard/local/local_settings.py \

service/files/defaults.yaml

@@ -10,6 +10,8 @@ configs:
       processes: 6
       threads: 15
 
+    theme: mirantis
+
 sources:
   openstack/horizon:
     git_url: https://git.openstack.org/openstack/horizon.git
@@ -23,3 +25,6 @@ sources:
   openstack/searchlight-ui:
     git_url: https://git.openstack.org/openstack/searchlight-ui.git
     git_ref: stable/newton
+  mirantis-theme:
+    git_url: https://review.fuel-infra.org/openstack/horizon-vendor-theme
+    git_ref: 9.0/mitaka

service/files/local_settings.j2

@@ -437,7 +437,7 @@ TIME_ZONE = "UTC"
 #    ('default', 'Default', 'themes/default'),
 #    ('material', 'Material', 'themes/material'),
 #]
-
+DEFAULT_THEME = "{{ horizon.theme }}"
 LOGGING = {
     'version': 1,
     # When set to True this will disable all logging except