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
added tests:
testVertexDirectionFetchEdges
testVertexDirectionFetchVertices
testVertexDirectionFetchCount
testVertexDirectionFetchIds
testVertexBadDirection
refactoring code
removing unused code
adding tests: testEdge, testEdgeBlankId, testEdgeInvalidId
use constants for status codes
Merge pull request #262 from raghavgautam/lineage

Adding lineage tests