ATLAS-1908: updated NotificationConsumer with a method removed earlier to avoid breaking existing usage (like in Ranger)

Change-Id: Ib8a7f338da7fd0f710fc683da87871e3d9c32035
Signed-off-by: Madhan Neethiraj <madhan@apache.org>

ATLAS-1908: updated to use existing Kafka consumer properties when equivalent new Kafka consumer properties are not present
Signed-off-by: Madhan Neethiraj <madhan@apache.org>

ATLAS-1766: updated NotificationConsumer implementation to use new Kafka Consumer API, to enable support for SASL_SSL protocol
Signed-off-by: Madhan Neethiraj <madhan@apache.org>

Signed-off-by: Madhan Neethiraj <madhan@apache.org>

ATLAS-1546: Changed to LOG.warn instead error in Hive hook should choose appropriate JAAS config if host uses kerberos ticket-cache (nixonrodrigues via kevalbhatt)

ATLAS-1546 : Fix for styleCheck error in Hive hook should choose appropriate JAAS config if host uses kerberos ticket-cache

Signed-off-by: Madhan Neethiraj <madhan@apache.org>

Signed-off-by: Madhan Neethiraj <madhan@apache.org>

Signed-off-by: Madhan Neethiraj <madhan@apache.org>

ATLAS-1129 Remove notification failed logs on retry and add sleep between retries (svimal2106 via sumasai)

ATLAS-1111 Data loss is observed when atlas is restarted while hive_table metadata ingestion into kafka topic is in-progress(shwethags via sumasai)

ATLAS-629 Kafka messages in ATLAS_HOOK might be lost in HA mode at the instant of failover. (yhemanth)

ATLAS-511 Ability to run multiple instances of Atlas Server with automatic failover to one active server (yhemanth via shwethags)