Fix EC2 RegisterImage ImageLocation starts with /

* Allows image location that begins with '/' during EC2 image register
* Adds relevant unit test

Fixes LP bug #1074908

Change-Id: I488b126c2079de4370823b347e80c7ec1ecc2c9f
Clean up vmwareapi.network_util.get_network_with_the_name

Removes an unnecessary method call and cleans up some logging.

Fixes bug 1185072

Change-Id: I1a57e2c2d8506796626d6852d25c5b699d031117
Merge "Clean up vmwareapi.network_util.get_network_with_the_name"
Merge "Fix EC2 RegisterImage ImageLocation starts with /"
Merge remote-tracking branch 'm_src_repo/citrix-fixes' into build-temp