Configurations stored in the database

This requires an update the for fake mode. We need to update the
database and import the validation-rules.json file.

partially implements blueprint: configuration-parameters-in-db

Change-Id: I183eedc5de42ad5c8474977c462bb6a69d6091b3
Carries the proxy variable while installing trove-integration

Closes-Bug: 1362797

Carries the proxy variable (http_proxy/https_proxy) to sudo,
while installing trove-integration.

"redstack install" fails to complete behind proxy as few of the installation
steps like "pip install" and "apt-get install" are processed under sudo
environment which does not carry the proxy variables exported in the local
environment.

Fix involves passing $HTTP_PROXY along with above mentioned installation
commands.

Change-Id: I23c0b5a5f6ae6cecacf15fc68be8e53effd03532
Fix Permissions on Postgresql Elements

permissions need to be 0755 to be discoverable by the
diskimage-builder, otherwise they're skipped outright.

Change-Id: I3ba357559d3f7f9f1fdad830bab47fd805d50c7f
Closes-Bug: #1364679
Merge remote-tracking branch 'upstream/master' into EE-1.1