several fixes for SOAP protocol

* fixed a small issue with binding
* fix for python2.6 when iterating over input msg
  (if the processed element is a comment - skip it)
* import print function (because it is used
  here in this form)
* fix minOccurs for non mandatory arguments
* operation namespace fix

    - https://bugs.launchpad.net/wsme/+bug/1235238
    - https://groups.google.com/forum/#!topic/python-wsme/gVzogTZlC7w

Change-Id: I2d237e04f27f8acd912cc8e2eb27d12ff72ebd04

wsmeext/soap/protocol.py

@@ -2,7 +2,7 @@
 A SOAP implementation for wsme.
 Parts of the code were taken from the tgwebservices soap implmentation.
 """
-from __future__ import absolute_import
+from __future__ import absolute_import, print_function
 
 import pkg_resources
 import datetime
@@ -383,6 +383,9 @@ class SoapProtocol(Protocol):
             return kw
         msg = context.soap_message
         for param in msg:
+            # FIX for python2.6 (only for lxml)
+            if use_lxml and isinstance(param, ET._Comment):
+                continue
             name = param.tag[len(self.typenamespace) + 2:]
             arg = context.funcdef.get_arg(name)
             value = fromsoap(arg.datatype, param, {

wsmeext/soap/wsdl.py

@@ -110,7 +110,7 @@ class WSDLGenerator(object):
                 type=self.soap_type(farg.datatype, True)
             )
             if not farg.mandatory:
-                element.set('minOccurs', 0)
+                element.set('minOccurs', '0')
 
         response_el = ET.Element(
             xs_ns('element'),
@@ -152,7 +152,7 @@ class WSDLGenerator(object):
         binding = ET.Element(
             wsdl_ns('binding'),
             name='%s_Binding' % self.service_name,
-            type='%s_PortType' % self.service_name
+            type='tns:%s_PortType' % self.service_name
         )
         ET.SubElement(
             binding,
@@ -224,7 +224,7 @@ class WSDLGenerator(object):
             )
             ET.SubElement(
                 operation,
-                wsdl_ns('operation'),
+                soap_ns('operation'),
                 soapAction=soap_fname
             )
             ET.SubElement(