canvas: std::auto_ptr -> std::unique_ptr

Change-Id: I1b58132c3155d59c78ef3e2414129319ee5e9fcd
comphelper: std::auto_ptr -> std::unique_ptr

Change-Id: I364d6252f470dcc6d71a191f1249e95ca1f284ce
connectivity: std::auto_ptr -> std::unique_ptr

Change-Id: I796dc05d1846f140a56b5a6f14a69a239324ae5b
dbaccess: std::auto_ptr -> std::unique_ptr

Change-Id: I2b27aaf589fcbe4da1680f624a57be7ae62b0dc5