Fix label's on output collections.

Thanks to @kellrott for reporting the issue.

https://trello.com/c/Qc2A4rsw

lib/galaxy/tools/parser/xml.py

@@ -158,6 +158,7 @@ class XmlToolSource(ToolSource):
 
         for collection_elem in out_elem.findall("collection"):
             name = collection_elem.get( "name" )
+            label = xml_text( collection_elem, "label" )
             default_format = collection_elem.get( "format", "data" )
             collection_type = collection_elem.get( "type", None )
             structured_like = collection_elem.get( "structured_like", None )
@@ -180,6 +181,7 @@ class XmlToolSource(ToolSource):
             output_collection = galaxy.tools.ToolOutputCollection(
                 name,
                 structure,
+                label=label,
                 default_format=default_format,
                 inherit_format=inherit_format,
                 inherit_metadata=inherit_metadata,

test/api/test_tools.py

@@ -302,7 +302,7 @@ class ToolsTestCase( api.ApiTestCase ):
         self._assert_has_keys( output_collection, "id", "name", "elements", "populated" )
         assert not output_collection[ "populated" ]
         assert len( output_collection[ "elements" ] ) == 0
-
+        self.assertEquals( output_collection[ "name" ], "Table split on first column" )
         self.dataset_populator.wait_for_job( create["jobs"][0]["id"], assert_ok=True )
 
         get_collection_response = self._get( "dataset_collections/%s" % output_collection[ "id" ], data={"instance_type": "history"} )
@@ -312,6 +312,8 @@ class ToolsTestCase( api.ApiTestCase ):
         self._assert_has_keys( output_collection, "id", "name", "elements", "populated" )
         assert output_collection[ "populated" ]
         assert len( output_collection[ "elements" ] ) == 2
+        self.assertEquals( output_collection[ "name" ], "Table split on first column" )
+
         # TODO: verify element identifiers
 
     @skip_without_tool( "cat1" )