spec: Big syntax merge with RHEL
    
    * Simplify build conditionals
    * Use less globbing in %files list
    * Merge package descriptions and metadata from RHEL
    * Separate out fedora specific bits from common bits shared with RHEL
    * Lots of small syntax changes to move closer to RHEL package
    
    Signed-off-by: Cole Robinson <crobinso@redhat.com>