Propagate action logical datastore type

Propagate action logical datastore type

Unlike RFC7950 and related specifications, actions are generalized
in ODL to work on any datastore type, as otherwise internal cooperation
could not work on onything but operational datastore.

This patch correctly propagates the invocation datastore type, so that
invoking actions on top of config datastore becomes possible.

JIRA: CONTROLLER-1894
Change-Id: I20f340bee0321a446a07d701650d6dac57057ee6
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>
(cherry picked from commit 093728d9bc64609b5503ae9191a8cc1d0a937b79)