This patch provides Tacker documents for error handling operations
(retry, fail, rollback) in V2-API. The specification about new API is
added to API Reference. Also, these descriptions are added to an error
handling page of Tacker Use Cases Guide.
This patch includes some improvements of these documents. For example,
modifying spelling inconsistencies, unifying uppercase and lowercase
letters and so on.
This patch does not include documents for other operations
(Modify, Scale, Heal, Changeextconn) in V2-API. Those documents
will be provided with another patch by the release of Yoga.
Implements: blueprint support-nfv-solv3-error-handling
Change-Id: Id045469db965b0e0ef12e271d9259002ef7e60af
a69f2f3fb5