MC Hub v6.1.0

Added

• Added cluster status logging for analytics

Changed

• Magic Castle releases are now fetched from Github
• Cluster provisioning polling interval changed to 30 seconds
• Bumped Magic Castle to 8.3

Fixed

• Fixed clusters' backward compatibility with older versions of Magic Castle
• Fixed puppet-magic_castle version by specifying the puppetenv_rev variable
• Fixed expired session handling by refreshing the page on session expiration
• Fixed dangling threads in all tests