Fallback to conductor if types are not stashed.

If the instance types are not stashed, fallback to
the conductor API to retrieve them.

bug 1164110

Change-Id: I1f0ef48e072f8580980de5bd8d43cf2206cd7d27
(cherry picked from commit e9c88b7d3657d83ab84c081fbd56183061ed09c7)
Merge "Fallback to conductor if types are not stashed." into stable/grizzly