core: use of Const for profile_key + replaced '@DEFAULT@' default profile_key by '@NONE@'

src/plugins/plugin_xep_0115.py

@@ -18,6 +18,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from sat.core.i18n import _
+from sat.core.constants import Const as C
 from logging import debug, info, error, warning
 from twisted.words.xish import domish
 from twisted.words.protocols.jabber import client, jid, xmlstream
@@ -116,7 +117,7 @@ class XEP_0115(object):
         presenceInst._legacy_send = presenceInst.send
         presenceInst.send = new_send
 
-    def generateHash(self, profile_key="@DEFAULT@"):
+    def generateHash(self, profile_key=C.PROF_KEY_NONE):
         """This method generate a sha1 hash as explained in xep-0115 #5.1
         it then store it in XEP_0115.cap_hash"""
         profile = self.host.memory.getProfileName(profile_key)