feat(formula): add mattermost-formula

* https://freenode.logbot.info/saltstack-formulas/20200108#c3052081-c3052088

pillar.example

@@ -97,6 +97,7 @@ ssf:
       - locale
       - logrotate
       - lvm
+      - mattermost
       - mongodb
       - mysql
       - nfs

ssf/defaults.yaml

@@ -22,8 +22,8 @@ ssf_node_anchors:
             #       An alternative method could be to use:
             #       `git describe --abbrev=0 --tags`
             # yamllint disable rule:line-length
-            title: 'feat: promote `ng`'
-            body: '* Semi-automated using https://github.com/myii/ssf-formula/pull/119'
+            title: 'refactor(semantic-release): standardise structure for this formula'
+            body: '* Automated using https://github.com/myii/ssf-formula/pull/117'
             # yamllint enable rule:line-length
           github:
             owner: 'saltstack-formulas'
@@ -342,6 +342,7 @@ ssf:
             name: 'redhat'
     logrotate: *formula_default
     lvm: *formula_default
+    mattermost: *formula_default
     mongodb: *formula_default
     mysql: *formula_default
     nfs: *formula_default

ssf/formulas.yaml

@@ -1153,6 +1153,21 @@ ssf:
           - [amazonlinux  ,   2   ,   2017.7,      2,         default]
           # # - [arch-base    , latest,   2017.7,      2,         default]
       semrel_files: *semrel_files_default
+    mattermost:
+      context:
+        git:
+          github:
+            owner: 'kjkeane'
+            repo: 'mattermost-formula'
+        inspec_suites_kitchen:
+          0:
+            inspec_yml:
+              summary: >-
+                Verify that the mattermost formula is setup and configured correctly
+            provisioner:
+              pillars_from_files:
+                - .sls: 'test/salt/default/pillar/mattermost.sls'
+      semrel_files: *semrel_files_default
     mongodb:
       context:
         git: