Conditions: ``field`` supports new format, it allow to comparison
data both from inspection and node info:
{'field': 'node://ironic/style/path', 'op': 'eq', 'value': 'val'}
{'field': 'data://introspection/path', 'op': 'eq', 'value': 'val'}
Actions: ``value`` supports fetching data from introspection, it's
using python string formatting notation:
{'action': 'set-attribute', 'path': '/driver_info/ipmi_address',
'value': '{data[inventory][bmc_address]}'}
Related-Bug: #1524753
Change-Id: Ie05f82e7a29fba2f743217f0893c085fd843cd5b
zhouxinyong