Merge pull request #137 from tazim/sam-1.2

modified the output format
changed the err string.
Merge branch 'sam-1.2' of github.com:gkhachik/katello-api into sam-1.2
refactor the stderr of guest pools (one more time)
changed stderr of pool restricted.
ignore initscripts lvm2 in upgrades
fix upgrade issue
katello ping return code: fixed finally