Allow insecure authentication

Pass through the value of OPENSTACK_SSL_NO_VERIFY from settings.py to
keystoneclient. This allows connecting to servers with self-signed
or otherwise invalid certificates for testing purposes.

Bug #1100131

Change-Id: I281fae400c1311af32e279083f51fba95e0e326c
Improves some UX details

Adds underline style to sortable column headers
in tables with more than one item.

Changes 'Click here to show only VNC' string
with 'Show only VNC' and adds underline style.

Substitute 'Unpause' with 'Resume' in Instances dropdown and
'Unpausing' with 'Resuming' in Task column on update.

Change-Id: I903722191d9c511b9961a666d0e644dbf87111b5
Fixes: Adds usability improvements
Bug: #1100418
Remove |safe from openrc.template

Review I56ec047da467b721bd1b57d2c97d05717e83f468 added |safe to
the TEMPLATE_NAME variable in order to allow special characters for
tenant names but it turned out to be a security issue as explained in
one of the comments.

This reverts commit 3a9b0da489030eaacc6cc0416f92192b74783ac8

It's still an issue to discuss as referenced in bug 1100042

Change-Id: I919a56ac799e3358bf3d56af3c6083814e97c98d
Merge "Improves some UX details"
Merge "Allow insecure authentication"
Merge "Remove |safe from openrc.template"