Updated openstack/openstack
Project: openstack/heat  9cf8c320517f1ee7fe3dbb4c774a619c5eda365a
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Return map parsed value at JsonParam.value

Currently, JsonParam returns String value as JsonParam.value.
However, SCHEMA_TYPES:MAP property doesn't support getting String value.
JsonParam have to return map value for to work properly.

Fixes bug #1256891

Change-Id: I5acc1aa95c0c0e7bebc760d8bf088971630696ec