(#22642) Added install_options to the RPM provider

Install options are available for use with the rpm provider, for
example, the --prefix flag.  Without this patch, there is no way to
provide these flags through puppet.

After this patch, the RPM provider accepts the install_options
parameter.  Parameters can be provided as a String, Array, or Hash.
Merge pull request #1932 from mklauber/fix/master/rpm_install_options

#22642 Adding install_options to RPM package provider