Add satellite checking in credentials validation
Add specs for satellite validation
Add -k key in curl for credentials checking.
It need in case, when server redirects as on on httpS*
url and SSL sertificat is not signed.
Error from curl:
  Peer certificate cannot be authenticated with known CA certificates
Add stdout\stderr logging
Add better exception handling for redhat checker
Add redhat checking specs for orchetrator
Merge remote-tracking branch 'origin/add-satellite-checking-validation' into fuel-777-vvk-mihgen

Conflicts:
	lib/astute/redhat_checker.rb