* Fix cassandra tests, explicitly set cluster port if provided
* Update cassandra.yml test-fixture
* Add port as part of the config option, fix tests
* Remove hostport splitting in cassandraConnectionProducer.createSession
* Include port in API docs
* Fix the mysql legacy username length
* Remove boolean parameter
* Add a MySQL 5.6 container to test the legacy MySQL plugin against
* Add database plugins to the make file
* Fix credsutil test
* Added HANA dynamic secret backend
* Added acceptance tests for HANA secret backend
* Add HANA backend as a logical backend to server
* Added documentation to HANA secret backend
* Added vendored libraries
* Go fmt
* Migrate hana credential creation to plugin
* Removed deprecated hana logical backend
* Migrated documentation for HANA database plugin
* Updated HANA DB plugin to use role name in credential generation
* Update HANA plugin tests
* If env vars are not configured, tests will skip rather than succeed
* Fixed some improperly named string variables
* Removed unused import
* Import SAP hdb driver
* WIP on mongodb plugin
* Add mongodb plugin
* Add tests
* Update mongodb.CreateUser() comment
* Update docs
* Add missing docs
* Fix mongodb docs
* Minor comment and test updates
* Fix imports
* Fix dockertest import
* Set c.Initialized at the end, check for empty CreationStmts first on CreateUser
* Remove Initialized check on Connection()
* Add back Initialized check
* Update docs
* Move connProducer and credsProducer into pkg for mongodb and cassandra
* Chage parseMongoURL to be a private func
* Default to admin if no db is provided in creation_statements
* Update comments and docs
navinanandaraj