Fix “not an rpm package (or package manifest):” error

On RHEL 7.0, if mountRHEL 7.1 iso and install RPM package, rpm command will complain：

[root@root Packages]# rpm -ivh xxxx.x86_64.rpm
error: xxxx.x86_64.rpm: not an rpm package (or package manifest):

So you should mount RHEL 7.0 iso, then all is OK。