remove remaining in_memory ticket classes to prep for adapter rework

Signed-off-by: Tyler Pickett <t.pickett66@gmail.com>
add registration ability for persistence adapters

Signed-off-by: Tyler Pickett <t.pickett66@gmail.com>
add configuration method for Persistence module

Signed-off-by: Tyler Pickett <t.pickett66@gmail.com>
plug in Persistence module in place of Database module

Signed-off-by: Tyler Pickett <t.pickett66@gmail.com>