[monasca-api] Change tox to use https instead of git
[monasca-api] Change tox to use https instead of git

Change in tox_install to work around proxy settings

Change-Id: I90f4a989bca7f0ee6ad001c94878e192b4dbcafe

sapcc/monasca-api,stackforge/monasca-api,stackforge/monasca-api,stackforge/monasca-api,sapcc/monasca-api,openstack/monasca-api,stackforge/monasca-api,sapcc/monasca-api,openstack/monasca-api,openstack/monasca-api