CLOUDIFY-1768 refactor, move exceptions to dedicated package
CLOUDIFY-1767 added handlers for exception types in cli
CLOUDIFY-1756 use just one exception for all 404 errors
CLOUDIFY-1660 fix admin injection
CLOUDIFY-1768 refactoring
CLOUDIFY-1660 implement uninstall, first stage
CLOUDIFY-1660 rest client is intialized, no need to retrieve it