Fix ztest when it is executed by just 'ztest' and not by full path '/usr/bin/ztest'.
Fix ztest when it is executed by just 'ztest' and not by full path
'/usr/bin/ztest'.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase