minor refactoring to improve readability
removing redundant code
simplifying generation of unique bundle
extracting ExecUtil class
use ClusterMerlin for generating unique cluster names
using FeedMerlin for generating unique names
moving setFeedClusters() method to feedMerlin
removing unused method
making setProcessFeeds() & setProcessClusters() methods static
use ProcessMerlin for unique names
moving setProcessClusters() method to ProcessMerlin
removing unused method
changing parameter type of setProcessFeeds()
moving method setProcessFeeds() to ProcessMerlin
moving variable declaration
removing unnecessary parameter and assignments
changing return type of readBundleFromFolder() method
reducing data uploading time from ~37 min to ~3min
Merge pull request #336 from rostafiychuk/master

UI tests improvements
Merge pull request #337 from pisaychuk/master

reducing data uploading time from ~37 min to ~3min