fix: change verbosity of error message

Certain negative tests perform corner testing leading to error
messages being reported. These error messages are expected. It is
in the best interest of user to qualify them as VERBOSE to not
cause confusion.

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: I765cb1763c8641134d892c2f5f89861e2a9b5666
2 files changed