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. remove the unnecessary "="
3. Update some URLs to latest

Change-Id: I94d8f5ef676a706e3ff8fabb188b264f20a024ae
Closes-Bug: #1831522

HACKING.rst

@@ -1,4 +1,4 @@
 watcher-tempest-plugin Style Commandments
-===============================================
+=========================================
 
 Read the OpenStack Style Commandments https://docs.openstack.org/hacking/latest/

README.rst

@@ -1,6 +1,6 @@
-===============================
+======================
 watcher-tempest-plugin
-===============================
+======================
 
 Description
 

doc/source/readme.rst

@@ -101,7 +101,7 @@ For more information, please refer to:
 - Keystone connection: https://docs.openstack.org/tempest/latest/configuration.html#keystone-connection-info
 - Dynamic Keystone Credentials: https://docs.openstack.org/tempest/latest/configuration.html#dynamic-credentials
 
-.. _virtual environment: http://docs.python-guide.org/en/latest/dev/virtualenvs/
+.. _virtual environment: https://docs.python-guide.org/dev/virtualenvs/
 .. _Tempest configuration guide: https://docs.openstack.org/tempest/latest/configuration.html
 
 

test-requirements.txt

@@ -7,7 +7,8 @@ hacking<0.13,>=0.12.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 doc8>=0.6.0 # Apache-2.0
 python-subunit>=1.0.0 # Apache-2.0/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
 oslotest>=3.2.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT

watcher_tempest_plugin/README.rst

@@ -115,8 +115,8 @@ For more information, please refer to:
 - Keystone connection: https://docs.openstack.org/tempest/latest/configuration.html#keystone-connection-info
 - Dynamic Keystone Credentials: https://docs.openstack.org/tempest/latest/configuration.html#dynamic-credentials
 
-.. _virtual environment: http://docs.python-guide.org/en/latest/dev/virtualenvs/
-.. _Tempest configuration guide: http://docs.openstack.org/tempest/latest/configuration.html
+.. _virtual environment: https://docs.python-guide.org/dev/virtualenvs/
+.. _Tempest configuration guide: https://docs.openstack.org/tempest/latest/configuration.html
 
 
 Watcher Tempest tests execution