Update spec theme to show incubation status

Since zaqar is an incubation project, it should be using the
incubation option in oslosphinx.

Change-Id: I74aaa317cf5df97c2a6e2945b3b2e91b4b07a69b

doc/source/conf.py

@@ -65,6 +65,7 @@ pygments_style = 'sphinx'
 # html_theme_path = ["."]
 # html_theme = '_theme'
 # html_static_path = ['static']
+html_theme_options = {'incubating': True}
 
 # Output file base name for HTML help builder.
 htmlhelp_basename = '%sdoc' % project

requirements.txt

@@ -1,3 +1,3 @@
 pbr>=0.6,<1.0
-oslosphinx
+oslosphinx>=2.2.0.0a2
 sphinx>=1.1.2,<1.2