XD-1202 update distro specific spring-data-hadoop

Updated build script to use distro specific spring-data-hadoop version
XD-1200 Updating hdfsjdbc job

- changing columns parameter to names to be consistent with other jobs that have CSV files as source

- re-enabling creation of database table

- making initializeDatabase default to false to be consistent with current bahavior of jdbc sink

- renaming batch-jdbc-import.properties to batch-jdbc.properties since they aren't just for import

- also renaming batch-mongo-import.properties to be consistent
Add a twittersearch stream to tweet_tests script
XD-1205 Adding tests for filejdbc jobs
Updated docs to tell users how to init the test.
Fix hdfs import tests.

Match change in option name 'columns' -> 'names'
XD-1200 Fixing hdfsjdbc job configuration in test script
XD-1186: Support for overriding application.yml

Use Spring Boot's spring.config.location option to point to an additional
configuration file which can be used to override the defaults.

Introduces XD_CONFIG environment variable which defaults to
config/xd-config.yml in the startup scripts but which a user can set to
point to a filesystem location outside XD if they wish.

The file config/xd-config.yml is commented out by default so has no effect
unless edited.
XD-1186: Support for overriding application.yml

Changed xd-config.yml to include ready to uncomment config snippits for
the database, redis and admin UI.
XD-1200 Fixing hdfsjdbc job configuration in test script
Merge branch 'tekul-XD-1186'