There are some duplicated code in nova client for generating
query string.
The 'prepare_query_string' method can convert dict params to
query string(it transforms the dict to a sequence of two-element
tuples in fixed order, then the encoded string will be consistent
in Python 2&3.)
This patch use utils.prepare_query_string instead of these and
plus some notes in the 'prepare_query_string' method.
Change-Id: Idb3c5e97f8bbcd5ec5446f776c10fa8c84b54d5d
Closes-Bug: 1727968
Module novaclient.v1_1 is used as implementation of V1.1, V2 and V3.
Since future development(microversioning) will be done across V2,
implementation should be done in appropriate module(to prevent misleading).
Despite the fact that implementation for all versions are equal, discover
method for contrib path worked only for v1.1. This patch fixes this bug and
modifies shell tests to check all versions.
Change-Id: Ib6798f4dfe177586302141f522dc593560ce6a5b
Yikun Jiang