This change switches from plain JDBC driver implementation to a HikariCP Pool implementation.
Pool Implementation is complete for PostgreSQL and SQLite, while MariaDB and MySQL implementation still uses JDBC drivers, however with HikariCP pools.
Also, I added extra properties for SQL databases, where users could specify their own datasource properties.
* Make variables final if they can be.
* Do not use final so that test can pass.
For testing, we use a trick to set this variable, but it won't work if
it is final. Right now, I'd like to keep the test.
* Database abstraction WIP
* Removes code duplication in the databases
Fixes a regression bug on database connections - more than 1 were being
made again.
* Added ignores to tests because they run async now
BONNe
tastybento