Make sure kitchen test dependencies formulas are always fetched from correct branch

Change-Id: Ia94338045add2d386d5fb37291845cb1817f707c
Related: PROD-29251
diff --git a/.kitchen.yml b/.kitchen.yml
index eee6cdf..f7a31a0 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -18,21 +18,27 @@
     - name: linux
       repo: git
       source: https://gerrit.mcp.mirantis.com/salt-formulas/linux
+      branch: <%=ENV['GERRIT_BRANCH'] || 'master' %>
     - name: apache
       repo: git
       source: https://gerrit.mcp.mirantis.com/salt-formulas/apache
+      branch: <%=ENV['GERRIT_BRANCH'] || 'master' %>
     - name: memcached
       repo: git
       source: https://gerrit.mcp.mirantis.com/salt-formulas/memcached
+      branch: <%=ENV['GERRIT_BRANCH'] || 'master' %>
     - name: rabbitmq
       repo: git
       source: https://gerrit.mcp.mirantis.com/salt-formulas/rabbitmq
+      branch: <%=ENV['GERRIT_BRANCH'] || 'master' %>
     - name: oslo_templates
       repo: git
       source: https://gerrit.mcp.mirantis.com/salt-formulas/oslo-templates
+      branch: <%=ENV['GERRIT_BRANCH'] || 'master' %>
     - name: mysql
       repo: git
       source: https://gerrit.mcp.mirantis.com/salt-formulas/mysql
+      branch: <%=ENV['GERRIT_BRANCH'] || 'master' %>
   state_top:
     base:
       "*":