Instance details view shows hostname (if it has it) or IP

Currently the hostname and IP is controlled by two config values:
trove_dns_support and add_addresses. I dont see a point of having
the hostname and IP indenpendent. It causes issues for old instances
when DNS is enabled.

I propose to simplify the view by showing hostname if it is set or
show the IP if it is not set.

Closes-bug: #1260567

Change-Id: Ia1fd47cbee89b10d53b0821e104a34eb31543846
Added Redis Crud Operations

blueprint redis-support

Change-Id: I741b3a39e1ec24ee81d441788be72f72726eda10
Remove copyright from empty files

According to policy change in HACKING:
http://docs.openstack.org/developer/hacking/#openstack-licensing
empty files should no longer contain copyright notices.

Change-Id: I3992a72c3614e2d0c65aee91e69d89ff806824fc
Closes-Bug: #1262424
Spelling correction in taskmanager/models.py

Changes:
-Corrected the definition spelling.

Change-Id: I8b3560ed9fb6b8cfaee0abe43df6500ac8f11027
Closes-Bug: #1270113
Edits on help strings

Fixes include rework of text, missing or extra spaces, wrong
capitalization and no sentence style capitalization.

Change-Id: If3d981d1736583b38328eeca5cc392fe10a7a0d0
Merge "Remove copyright from empty files"
Merge "Added Redis Crud Operations"
Merge "Instance details view shows hostname (if it has it) or IP"
Merge "Edits on help strings"
Merge "Spelling correction in taskmanager/models.py"