Add reverse DNS lookup to installer for server and capsule.
Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1219503
Description of problem:
Proxy Exception stacktrace in production logs while promoting a CV from DEV env to QA env.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Create DEV and QA environments.
2. Create CV with some RH contents.
3. Publish and promote this CV to DEV env.
4. After successful promote to DEV, promote the CV to QA env.
5. Observe the production logs while promoting the CV to QA env.
1. Long stack-trace of ProxyException has thrown in production logs.
2. Promotion to QA fails.
Promotion of CV should be successful to any env.
Also non localized stacktrace for same error can be observed for upgraded Sat6 server.