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
3. Bump the keystoneauth1 to 3.14.0 to fix the gate[0]

[0]: http://logs.openstack.org/40/666040/4/check/openstack-tox-lower-constraints/063a064/job-output.txt.gz#_2019-06-18_16_35_28_185448

Change-Id: I5cb981175922df52ae55961109c904f6ecf94d24

README.rst

@@ -116,4 +116,4 @@ Source Code
 ===========
 
 The project source code repository is located at:
-https://git.openstack.org/cgit/openstack/freezer-web-ui
+https://opendev.org/openstack/freezer-web-ui/

doc/requirements.txt

@@ -1,7 +1,9 @@
 # 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.
-sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
+
+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-apidoc>=0.2.0  # BSD
 openstackdocstheme>=1.18.1 # Apache-2.0
 reno>=2.5.0 # Apache-2.0

lower-constraints.txt

@@ -20,7 +20,7 @@ idna==2.6
 imagesize==1.0.0
 iso8601==0.1.12
 Jinja2==2.10
-keystoneauth1==3.11.0
+keystoneauth1==3.14.0
 linecache2==1.0.0
 logilab-common==1.4.1
 MarkupSafe==1.0

test-requirements.txt

@@ -1,6 +1,7 @@
 # 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.
+
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 
 coverage!=4.4,>=4.0 # Apache-2.0
@@ -10,5 +11,6 @@ pylint==1.4.5 # GPLv2
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
 unittest2>=1.1.0 # BSD
-sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
+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
 oslosphinx>=4.7.0 # Apache-2.0