Use xml.sax.saxutils escape instead of one from generateds

Change-Id: I29d6d7191492e84650df3a3c95e127fc6beb1097
Partial-Bug: #1394044
(cherry picked from commit 0c06395)

ifmap_frontend.py

@@ -2388,6 +2388,7 @@ def _generate_ifmap_db_impl(self, gen_fname, gen_type_pfx):
         write(gen_file, "import cStringIO")
         write(gen_file, "from lxml import etree")
         write(gen_file, "")
+        write(gen_file, "from xml.sax.saxutils import escape")
         write(gen_file, "from cfgm_common.ifmap.client import client, namespaces")
         write(gen_file, "from cfgm_common.ifmap.request import NewSessionRequest, RenewSessionRequest")
         write(gen_file, "from cfgm_common.ifmap.request import EndSessionRequest, PublishRequest")
@@ -2455,7 +2456,8 @@ def _generate_ifmap_db_impl(self, gen_fname, gen_type_pfx):
                 write(gen_file, "        if field is not None:")
                 if not prop.getCType():
                     # simple type
-                    write(gen_file, "            meta = Metadata('%s' , str(obj_dict['%s'])," %(prop_name, prop_field))
+                    write(gen_file, "            norm_str = escape(str(obj_dict['%s']))" %(prop_field))
+                    write(gen_file, "            meta = Metadata('%s', norm_str," %(prop_name))
                     write(gen_file, "                   {'ifmap-cardinality':'singleValue'}, ns_prefix = 'contrail')")
                 else: # it is complex type, use TypeGenerator's class
                     export_args = "buf, level = 1, name_ = '%s', pretty_print = False" %(prop_name)
@@ -2907,6 +2909,10 @@ def _generate_ifmap_db_impl(self, gen_fname, gen_type_pfx):
             write(gen_file, "        else: # parent is config-root")
             write(gen_file, "            parent_imid = '%s'" %(_BASE_PARENT_IMID))
             write(gen_file, "")
+            write(gen_file, "        # Normalize/escape special chars")
+            write(gen_file, "        my_imid = escape(my_imid)")
+            write(gen_file, "        parent_imid = escape(parent_imid)")
+            write(gen_file, "")
             write(gen_file, "        return (my_imid, parent_imid)")
             write(gen_file, "    #end %s_alloc_ifmap_id" %(method_name))
             write(gen_file, "")