Add linting for the sig.yaml

And correct a couple of small issues.

Change-Id: I8fcdf0a9387aff7be01bccbd9b10a84a88df4080

.yamllint

@@ -0,0 +1,6 @@
+---
+extends: default
+rules:
+  line-length:
+    level: warning
+    max: 90

.zuul.yaml

@@ -1,6 +1,12 @@
 - project:
     templates:
       - build-openstack-docs-pti
+    check:
+      jobs:
+        - openstack-tox-linters
+    gate:
+      jobs:
+        - openstack-tox-linters
     promote:
       jobs:
         - promote-governance-sigs

sigs.yaml

@@ -1,3 +1,4 @@
+---
 Ansible:
   chairs:
     - name: Mohammed Naser
@@ -143,8 +144,8 @@ First Contact:
       email: matt@oliver.net.au
   scope: >
     To provide a place for new contributors to come for information and advice.
-    This group will also analyze and document successful contribution models while
-    seeking out and providing information to new members of the community.
+    This group will also analyze and document successful contribution models
+    while seeking out and providing information to new members of the community.
   status: active
   url: https://wiki.openstack.org/wiki/First_Contact_SIG
 

test-requirements.txt

@@ -6,3 +6,4 @@ docutils>=0.11,!=0.13.1  # OSI-Approved Open Source, Public Domain
 sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7' # BSD
 sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2;python_version>='3.4' # BSD
 openstackdocstheme>=1.25.1  # Apache-2.0
+yamllint

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = docs
+envlist = docs,linters
 minversion = 1.6
 skipsdist = True
 
@@ -16,3 +16,7 @@ commands = {posargs}
 [testenv:docs]
 basepython = python3
 commands = sphinx-build -W -b html -d doc/build/doctrees doc/source doc/build/html
+
+[testenv:linters]
+basepython = python3
+commands = yamllint sigs.yaml