CDAP-15859. Maria DB database Source and Sink plugins

[dgrinenko]

JIRA: https://issues.cask.co/browse/CDAP-15859
WIKI: https://wiki.cask.co/display/CE/MariaDB+database+plugin

In the scope of this PR were added separate MariaDB plugin

Tested with latest GA MariaDB 10.4.7

[dgrinenko]

@albertshau @CuriousVini @mikkin Could you please review or point to the person who can help with code review.

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[googlebot]

CLAs look good, thanks!

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