fixed test -- workflow was getting deleted
adding tags to cluster, feed and processes
added test user to entity node test
added testVertexId, testVertexNoId
adding testVertexInvalidId
added testVertexProperties
cluster is not associated with any user
adding checks to testVertexProperties
adding test tags
adding javadocs
adding javadoc
added vertex property tests
adding tests related to vertex filtering
code refactoring
Merge pull request #266 from karishmag9/master

fixed test -- workflow was getting deleted
fixing the type cast error
removing summary from post request,as its a get request
fixing update test
making retry back to 20
new methods for lineage testing added