OpTestConfiguration: Exception handling cleanup
OpTestConfiguration: Exception handling cleanup

Catch exceptions for reservation cleanup.

Signed-off-by: Deb McLemore <1938e6bc52a6fb400ff401d42bc5360c2c7aaa30@linux.ibm.com>

open-power/op-test-framework,open-power/op-test-framework,open-power/op-test-framework