Error getting relationshps in case of custom_def capability

[Miguel Caballer]

In case that you define a custom capability and use it in a node requirements (without specifying the node type) parsing fails with this error:

  File "toscaparser/tosca_template.py", line 101, in init
    self.topology_template = self._topology_template()
  File "toscaparser/tosca_template.py", line 120, in _topology_template
    None)
  File "toscaparser/topology_template.py", line 60, in init
    self.graph = ToscaGraph(self.nodetemplates)
  File "toscaparser/tpl_relationship_graph.py", line 19, in init
    self._create()
  File "toscaparser/tpl_relationship_graph.py", line 40, in _create
    relation = node.relationships
  File "toscaparser/nodetemplate.py", line 61, in relationships
    explicit = self._get_explicit_relationship(r, value)
  File "toscaparser/nodetemplate.py", line 140, in _get_explicit_relationship
    for rtype in self.type_definition.relationship.keys():
  File "toscaparser/elements/nodetype.py", line 86, in relationship
    relation = self._get_relation(key, value)
  File "toscaparser/elements/nodetype.py", line 117, in _get_relation
    ntype = NodeType(ndtype)
  File "toscaparser/elements/nodetype.py", line 30, in init
    super(NodeType, self).__init__(ntype, self.NODE_PREFIX, custom_def)
  File "toscaparser/elements/statefulentitytype.py", line 38, in init
    if entitytype.startswith(self.TOSCA + ":"):
AttributeError: 'NoneType' object has no attribute 'startswith'

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/461742

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/461742
Committed: https://git.openstack.org/cgit/openstack/tosca-parser/commit/?id=c3e180db7928d9eb78b565e16749542a6a663d3d
Submitter: Jenkins
Branch: master

commit c3e180db7928d9eb78b565e16749542a6a663d3d
Author: Miguel Caballer <email address hidden>
Date: Tue May 2 13:34:00 2017 +0200

    Fix error getting relationshps in case of custom_def capability

    Change-Id: I5bbc21113451d17e887ee79426e4205d40f57f6a
    Related-Bug: #1687598