Add c3p0 dependency (fix #917)
Add c3p0 dependency (fix #917)

orcoliver/traccar,al3x1s/traccar,renaudallard/traccar,jon-stumpf/traccar,vipien/traccar,5of9/traccar,tsmgeek/traccar,ninioe/traccar,tananaev/traccar,ninioe/traccar,jon-stumpf/traccar,jssenyange/traccar,tananaev/traccar,ninioe/traccar,stalien/traccar_test,jssenyange/traccar,duke2906/traccar,renaudallard/traccar,vipien/traccar,5of9/traccar,jssenyange/traccar,orcoliver/traccar,tsmgeek/traccar,jon-stumpf/traccar,al3x1s/traccar,orcoliver/traccar,duke2906/traccar,tsmgeek/traccar,stalien/traccar_test,AnshulJain1985/Roadcast-Tracker,joseant/traccar-1,tananaev/traccar,joseant/traccar-1,AnshulJain1985/Roadcast-Tracker