test: Skip Travis-CI tests for python 2.4.
Ignores character cases of a error message that is displayed when no nodes are found using iscsiadm command.
Merge branch 'hotfix/bug_19_iscsiadm_error_msg_ignorecase'
Merge branch 'hotfix/bug_19_iscsiadm_error_msg_ignorecase' into develop
Merge branch 'develop'