Backport 6888 to 0.14.0 incubating#7053

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surekhasaharan wants to merge 7 commits intoapache:masterfrom

surekhasaharan:backport-6888-to-0.14.0-incubating

Commits on Feb 6, 2019

Add null checks in DruidSchema (#6830) (#7018)

clintropolis
authored and
jihoonson
committed

Commits on Feb 7, 2019

Improper equals override is fixed to prevent NullPointerException (#6938) (#7022)

clintropolis
authored and
fjy
committed
Fix for getSingleObjectSummary, replacing keyCount with objectSummaries().size (#7000) (#7013)

jihoonson
authored and
fjy
committed

Commits on Feb 8, 2019

Improper getter value is fixed. (#6930) (#7033)

clintropolis
authored and
fjy
committed
Fix filterSegments for TimeBoundary and DataSourceMetadata queries (#7023) (#7040)

jihoonson
authored and
clintropolis
committed

Commits on Feb 9, 2019

[Issue #6967] NoClassDefFoundError when using druid-hdfs-storage (#7015) (#7045)

jon-wei
authored and
fjy
committed

Commits on Feb 12, 2019

Fix num_rows in sys.segments (#6888)
Surekha
committed