[orientdb] properties cleanup

Added log4j properties for mongodb to not show debug output as default

Cleaner handling of properties.
Updated documentation of available properties.
Removed default database url.

Making progress towards #539

[orientdb] version bump to 2.1.8

Merge pull request #564 from DevFactory/staging/source-files-should-not-have-any-duplicated-blocks-fix-8

Source files should not have any duplicated blocks

[elasticsearch] Bump version from 0.19.8 to 2.1.1

The version bump required some fixes because of changes to the OrientDB
API as well as to accomodate for changes in thread safety for testing.

[accumulo] Accumulo binding does not work in 0.5.0 release

[orientdb] added test cases

Merge pull request #556 from DevFactory/staging/entrySet-should-be-iterated-when-both-the-key-and-value-are-needed-fix-4

"entrySet()" should be iterated when both the key and value are needed

[orientdb] fixed end table scan issue

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

[core, Cassandra, gemfire, mapkeeper] Fixing squid:S2864 -  "entrySet()" should be iterated when both the key and value are needed

Fixes #562

Merge pull request #555 from DevFactory/staging/return-statements-should-not-occur-in-finally-blocks-fix-2

"return" statements should not occur in "finally" blocks

[Cassandra] removed tracing from insert

Merge pull request #565 from DevFactory/staging/Collection-isEmpty-should-be-used-to-test-for-emptiness-fix-9

Collection.isEmpty() should be used to test for emptiness

pmd:UnnecessaryConstructor - Unnecessary constructor, squid:EmptyStatementUsageCheck - Empty statements should be removed

[core dynamodb googledatastore infinispan] Fixing pmd:UnnecessaryConstructor - Unnecessary constructor, squid:EmptyStatementUsageCheck - Empty statements should be removed

[core accumulo couchbase memcached] Fixing squid:S1155 - Collection.isEmpty() should be used to test for emptiness

Unused local variables should be removed

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

[mongodb] Update to use BATCHED_OK Status for batched inserts.

This ensures that users do not confuse the results from batched
and non-batched operations.

Closes #522

Bumped elasticsearch version and fix multiple api changes.
update README.md troubleshoot section.

[tarantool] Update tarantool driver version

[mongodb] Update the documentation for MongoDB. Use YCSB from binary instead

[kudu] revert kudu version to 0.6.0

blocks gh-542