ATLAS-2849: Basic search result list for classification= '_NOT_CLASSIFIED' returns type vertices in addition to matching entity vertices

(This closes #8)
Signed-off-by: apoorvnaik <apoorvnaik@apache.org>

Revert "ATLAS-2841: Regression, Tag Propagation : When a table is moved from database1 to database2 , tag propagated from db1 still propagated to table."

This reverts commit 6de9428f.

ATLAS-2841: Regression, Tag Propagation : When a table is moved from database1 to database2 , tag propagated from db1 still propagated to table.

ATLAS-2840: Regression - Tag Propagation, Deleted Entity : When an entity is deleted, tags propagated to it are removed

ATLAS-2835: Regression: Classifications propagated from term is not removed during term-entity disassociation

ATLAS-2830: Tag Propagation, Entity Delete : Classification update notification not sent to entities down the lineage present after the deleted entity

ATLAS-2808: further updates
Signed-off-by: Graham Wallis <graham_wallis@uk.ibm.com>

Change-Id: I6e250653da854ecf75bf004c43aaf854ca061d26

UI : Provide option whether to delete propagated classification on entity delete during add classification
Signed-off-by: Sarath Subramanian <ssubramanian@hortonworks.com>

Signed-off-by: Sarath Subramanian <ssubramanian@hortonworks.com>

Also, skipping add-relationship authorization if either end has legacy attribute - since this would be covered in authorization of entity-update

 EntityGraphRetriever for FullTextMapperV2
Signed-off-by: apoorvnaik <apoorvnaik@apache.org>

ATLAS-2822: Provide option whether to delete propagated classification on entity delete during add classification

Signed-off-by: Ashutosh Mestry <amestry@hortonworks.com>

Signed-off-by: Sarath Subramanian <ssubramanian@hortonworks.com>

Change-Id: Ia40cab9a258eb7e679975b414c7d6caf9eb6cbb5

Change-Id: I1219fa682f631d43d16cbbe9a49f375ca4ba26f5
Signed-off-by: apoorvnaik <apoorvnaik@apache.org>