Remove sqlite3 dependency, broken SQLite support

We do not test against, or officially support, SQLite.

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Merge branch 'dev' into feature/remove-sqlite3-dependency

Conflicts:
	.travis.yml
Removal of sqlite3 related packages
Merge pull request #2204 from opf/feature/remove-sqlite3-dependency

Remove sqlite3 dependency, broken SQLite support