Update from upstream with fixes for edge cases around ec2 facts. Rebase to 1.6.15 and fix issue found in bz #871211

This is a rebase to the upstream of 1.6.15. This should be a backward
compatible release with what is currently in Fedora/EPEL. The known
issue of openstack/ec2 fact exception handling has been resolved in
1.6.15.

This commit also adds the .asc file back as it used by facter
maintainers during package creation.

Moves facter to newest version. This is a fully compatible version from 1.6.6 which is in stable. It also has bug fixes and a few enhancements. Moves facter to newest version. This is a fully compatible version from 1.6.6 which is in stable. It also has bug fixes and a few enhancements. Rebase to 1.6.15 and fix issue found in bz #871211

This is a rebase to the upstream of 1.6.15. This should be a backward
compatible release with what is currently in Fedora/EPEL. The known
issue of openstack/ec2 fact exception handling has been resolved in
1.6.15.

This commit also adds the .asc file back as it used by facter
maintainers during package creation.

Moves facter to newest version. This is a fully compatible version from 1.6.6 which is in stable. It also has bug fixes and a few enhancements. Moves facter to newest version. This is a fully compatible version from 1.6.6 which is in stable. It also has bug fixes and a few enhancements.