Retry on network failure for melange GET requests
Retry on network failure for melange GET requests

Fixes bug 929041

The melange service may need to periodically be restarted for various
operations reasons, so retry GET requests if we receive a socket error.

Change-Id: I010650dac7793d0041d41be067eb4b32e2171c8a

n0ano/gantt,n0ano/gantt