api: clear the rtslib_fb block store cache before manipulating LUNs

[dillaman]

Signed-off-by: Jason Dillaman dillaman@redhat.com

[mikechristie]

What was the bug you hit? I think I was hunting a similar bug. Was your issue one where we were updating the cache but then a multi step operation later failed leaving the cache with the invalid updated value?

[mikechristie]

Ignore my question. I see the bz link to here.

[dillaman]

@mikechristie It was this one [1] -- adding a new storage object caused it to fail complaining that an unrelated storage object wasn't in the cache.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1639561

[mikechristie]

Manually merged.