AAA - Setup script does not process 'dig' output correctly

Issue

• As part of our upgrade process to move to RHEV 4, we're trying to get ovirt-engine-extension-aaa-ldap-setup working with Active Directory. When running this, we get this output:

[ ERROR ] Failed to execute stage 'Environment customization': Command '/usr/bin/dig' failed to execute
[ INFO  ] Stage: Clean up

Manually executing the same command shows that it works.