improvement: modular structure for providers created

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
integrated bitbucket list into new modular api

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
moved bitbucket issue create and delete to modular structure

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>