May 15th update (identity, router gateway, options, summary)

May 15th update (identity, router gateway, options, summary)

JIRA: AUTO-38

Automated configuration of an OpenStack instance for ONAP

Updates:
- using identity proxy now works
- attaching a gateway to a router now works (at router creation)
- added --debug and --delete options
- added summary display at the end, with network IDs (for YAML files)

Not yet working:
- existence tests and deletions, waiting on OS-SDK bug fix
  (equality test in Resource.py)
- assigning user to project using SDK identity proxy
  (no such method yet in SDK identity proxy)

Signed-off-by: Gerard Damm <gerard.damm@wipro.com>
Change-Id: I69c922c1e3a3ab94988d470637251598124b98ac
(cherry picked from commit b718a43380376d2b19222c4203c97a95ca849ae8)