Sync Sphinx requirement

1. Sync sphinx dependency with global requirements. It caps python 2 since
sphinx 2.0 no longer supports Python 2.7.
2. Update some URLs to latest

Change-Id: I24cb8d8d084a291028a961823fcac4f09b4bf1ca

README.rst

@@ -8,9 +8,7 @@ Documentation for the project can be found at:
   https://docs.openstack.org/aodh/latest/
 
 The project home is at:
-  https://launchpad.net/aodh
+  https://storyboard.openstack.org/#!/project/openstack/aodh
 
 Bugs and feature requests are tracked on Launchpad at:
-
-    https://bugs.launchpad.net/aodh
-
+  https://storyboard.openstack.org/#!/project/openstack/aodh

doc/requirements.txt

@@ -1,5 +1,10 @@
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+
 openstackdocstheme>=1.11.0  # Apache-2.0
 reno>=0.1.1  # Apache2
-sphinx>=1.6.2
+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,>=1.6.2;python_version>='3.4'  # BSD
 sphinxcontrib-httpdomain
 sphinxcontrib-pecanwsme>=0.8

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = aodh
-url = http://launchpad.net/aodh
+url = https://storyboard.openstack.org/#!/project/openstack/aodh
 summary = OpenStack Telemetry Alarming
 description-file =
     README.rst