ISPyB client: handle boolean loginTranslate property correctly

When using YAML config file for ISPyBClient hardware object,
it feels logical to use YAML boolean type for 'loginTranslate'
property. For example a following config file:

  class: ISPyBClient.ISPyBClient
  configuration:
    authServerType: ispyb
    loginTranslate: false

This change fixes a bug where 'self.loginTranslate' would be
assigned True value for the config file above.

mxcubecore/HardwareObjects/ISPyBClient.py

@@ -199,7 +199,7 @@ def init(self):
             if self.ldapConnection is None:
                 logging.getLogger("HWR").debug("LDAP Server is not available")
 
-        self.loginTranslate = self.get_property("loginTranslate") or True
+        self.loginTranslate = self.get_property("loginTranslate", True)
         self.beamline_name = HWR.beamline.session.beamline_name
 
         self.ws_root = self.get_property("ws_root")