BugFix: FakeDirver put RC FPGA error
BugFix: FakeDirver put RC FPGA error

When cyborg-cond make sure RC FPGA exists or not, it will
try to create RC FPGA.

In fact, the format of the RC that placment-api accepts
must be CUSTOM_XXX[1]. Because FPGA RC already exists,
we don't need to create it, so skipping it directly.

[1]. https://docs.openstack.org/api-ref/placement/?expanded=update-resource-class-microversions-1-2-1-6-detail,update-resource-class-detail#create-resource-class

Story: 2006933

Change-Id: I81adaec569ff9089d26ae90602ca2265c8fa4791

openstack/nomad