style: sort imports in compute, db and services modules

gns3server/services/__init__.py

@@ -14,8 +14,8 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from .authentication import AuthService
 from .access_tickets import AccessTicketService
+from .authentication import AuthService
 
 auth_service = AuthService()
 access_ticket_service = AccessTicketService()