Use package-data for spec installed_rpms too (#2195)
Use package-data for spec installed_rpms too (#2195)

* The content in package-data is the same with installed-rpms but it includes more extra fields
  like redhat sign info
Signed-off-by: Huanhuan Li <698138010c846de0dab86d9f6cf3a5f8e2b70af1@redhat.com>
RedHatInsights/insights-core,RedHatInsights/insights-core