* Remove unnecessary getObjectMetadata() from getS3ObjectAndMetadata()

ObjectMetadata is available from S3Object.getObjectMetadata().
We don't need to send a separate GetObjectMetadata Request (an
HTTP HEAD request), in order to get the metadata. This will double
performance for read workloads.

Signed-off-by: Xing Lin <Xing.Lin@netapp.com>

* Remove one unused import to pass style check.

Signed-off-by: Xing Lin <xing.lin@netapp.com>
(cherry picked from commit 381aaebc83476e1d1c844f6db207f336bea4f8c6)

closes #994 

[core] Fixing squid:S1319 -  Declarations should use Java collection interfaces such as "List" rather than specific implementation classes such as "LinkedList".
(manolama - updated bindings added since the PR)

Signed-off-by: Chris Larsen <clarsen@yahoo-inc.com>

S3Object opened in getS3ObjectAndMetadata() should be closed.

- define checkstyle configs in as few places as possible
- use checkstyle:check since it has defaults that match what we want (fail after logging to console)
- modules that have current failures set property checkstyle.failOnViolation to false.

[mongodb s3 tarantool] Fixing common-java:DuplicatedBlocks - Source files should not have any duplicated blocks

[cassandra cassandra2 dynamodb hbase098 hbase10 jdbc s3] Fixing squid:S1481 - Unused local variables should be removed

- version number fix
- DB methods return Status objects.

This reverts commit 0e5866eb.

Restores #372