[fix] handle phone numbers of type long

refs #2664

On python2 a long phone will have type 'long' instead of 'int' which
will cause an error during construction of phone storage dir

yowsup/common/tools.py

@@ -94,7 +94,7 @@ def constructPath(*path):
 
     @staticmethod
     def getStorageForPhone(phone):
-        if type(phone) is int:
+        if type(phone) is not str:
             phone = str(phone)
         return StorageTools.constructPath(phone + '/')