Fix jenkins script.
Fix jenkins script.

When building Jenkins environment make sure that we fetch submodules
before running pip install. Also drop test database on every run.

hoosteeno/mozillians,chirilo/mozillians,glogiotatidis/mozillians-new,safwanrahman/mozillians,brian-yang/mozillians,akatsoulas/mozillians,mozilla/mozillians,chirilo/mozillians,chirilo/mozillians,justinpotts/mozillians,fxa90id/mozillians,akatsoulas/mozillians,ChristineLaMuse/mozillians,akarki15/mozillians,johngian/mozillians,brian-yang/mozillians,brian-yang/mozillians,akatsoulas/mozillians,satdav/mozillians,justinpotts/mozillians,safwanrahman/mozillians,mozilla/mozillians,hoosteeno/mozillians,brian-yang/mozillians,glogiotatidis/mozillians-new,akarki15/mozillians,akarki15/mozillians,anistark/mozillians,anistark/mozillians,johngian/mozillians,hoosteeno/mozillians,mozilla/mozillians,hoosteeno/mozillians,akarki15/mozillians,anistark/mozillians,satdav/mozillians,akatsoulas/mozillians,fxa90id/mozillians,ChristineLaMuse/mozillians,ChristineLaMuse/mozillians,justinpotts/mozillians,justinpotts/mozillians,safwanrahman/mozillians,safwanrahman/mozillians,fxa90id/mozillians,mozilla/mozillians,glogiotatidis/mozillians-new,glogiotatidis/mozillians-new,satdav/mozillians,satdav/mozillians,anistark/mozillians,johngian/mozillians,fxa90id/mozillians,johngian/mozillians,chirilo/mozillians