Webhook's patcher currently can't be re-applied to its output because it
rejects containers with the env vars it adds (e.i. FPGA_AFU_* and
FPGA_REGION_*).
Instead of rejecting container with disallowed env vars just reset them
first upon patching.
This commit adds new function validateContainer() that runs the
same FPGA_* ENV validation checks as before in getRequestedResources().
The restructuring is done in preparations for moving
getRequestedResources() to a separate package.
Signed-off-by: Mikko Ylinen <mikko.ylinen@intel.com>
