Sync testing configuration with master branch

    - Drop Travis CI support
    - Also fix escaping of special characters
    - Drop testing of SaltStack 2016.3
    - Make sure kitchen test dependencies formulas are always fetched from correct branch

Fixes: PROD-25037
Related: PROD-27314
Related: PROD-29251

Enables: https://gerrit.mcp.mirantis.com/#/c/41313/

Change-Id: Id1e957ad9b812991e51efeb66186ca57916757fe
(cherry picked from commit e10c3041e15516fedb2b1558f2474db721ebc81e)
(cherry picked from commit fae0165231e5ba066ad6c4f4dbef1a24a0c4b228)
(cherry picked from commit 5db40fe36ba2efbc0c5e6965b185eb6957950694)
diff --git a/.kitchen.yml b/.kitchen.yml
index 9ef697b..49b8836 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -17,10 +17,12 @@
   dependencies:
     - name: linux
       repo: git
-      source: https://github.com/salt-formulas/salt-formula-linux.git
+      source: https://gerrit.mcp.mirantis.com/salt-formulas/linux.git
+      branch: <%=ENV['GERRIT_BRANCH'] || 'master' %>
     - name: salt
       repo: git
-      source: https://github.com/salt-formulas/salt-formula-salt.git
+      source: https://gerrit.mcp.mirantis.com/salt-formulas/salt.git
+      branch: <%=ENV['GERRIT_BRANCH'] || 'master' %>
   state_top:
     base:
       "*":
@@ -39,17 +41,24 @@
   name: inspec
   sudo: true
 
+docker_images:
+  - &xenial-20177 <%=ENV['IMAGE_XENIAL_20177'] || 'docker-dev-local.docker.mirantis.net/epcim/salt/saltstack-ubuntu-xenial-salt-2017.7/salt:2018_11_19'%>
+  - &xenial-stable <%=ENV['IMAGE_XENIAL_STABLE'] || 'docker-dev-local.docker.mirantis.net/epcim/salt/saltstack-ubuntu-xenial-salt-stable/salt:2018_11_19'%>
 
 platforms:
-  - name: <%=ENV['PLATFORM'] || 'ubuntu-xenial'%>
+  - name: xenial-2017.7
     driver_config:
-      image: <%=ENV['PLATFORM'] || 'trevorj/salty-whales:xenial'%>
+      image: *xenial-20177
+      platform: ubuntu
+
+  - name: xenial-stable
+    driver_config:
+      image: *xenial-stable
       platform: ubuntu
 
 suites:
-
   - name: agent
     provisioner:
       pillars-from-files:
         fluentd.sls: tests/pillar/agent.sls
-# vim: ft=yaml sw=2 ts=2 sts=2 tw=125
+# vim: ft=yaml sw=2 ts=2 sts=2 tw=125
\ No newline at end of file