fixed output leak from TestRunCommandWithContentTrustErrors unit tests
fixed output leak from TestRunCommandWithContentTrustErrors unit tests

Signed-off-by: Arash Deshmeh <43f13bf9176a6d2ff9d5707b429cefab57b8a40c@ca.ibm.com>

cpuguy83/cli,thaJeztah/cli,docker/cli,thaJeztah/cli,docker/cli,cpuguy83/cli