interfaces.application.IApplication: update loadSettings signature with actual usage

Over the years (for example commits 89d754f2, 58a72658, a6fc7dfe, etc),
the signature of the implementation loadSettings evolved and the
interface became outdated.

This updates the interface with current implementation, so that we can
use zope.interface.verify.verifyClass in the tests

cloudooo/handler/ooo/application/openoffice.py

@@ -89,7 +89,7 @@ class OpenOffice(Application):
   def loadSettings(self, hostname, port, path_run_dir,
                    office_binary_path, uno_path, default_language,
                    environment_dict=None, **kw):
-    """Method to load the configuratio to control one OpenOffice Instance
+    """Method to load the configuration to control one OpenOffice Instance
     Keyword arguments:
     office_path -- Full Path of the OOo executable.
       e.g office_binary_path='/opt/openoffice.org3/program'

cloudooo/interfaces/application.py

@@ -45,10 +45,15 @@ class IApplication(Interface):
   def pid():
     """Get the process pid"""
 
-  def loadSettings(hostname,
-                  port,
-                  working_path,
-                  office_binary_path):
+  def loadSettings(
+      hostname,
+      port,
+      working_path,
+      office_binary_path,
+      uno_path,
+      default_language,
+      environment_dict=None,
+    ):
     """Load configuration to control OOo Instances"""
 
   def status():