Bump up Hue to 2.2.0
Also, note that Hue plugins are not required on Yarn since Yarn's rest API is used for integration. Consequently, while we are on it, we should get rid of the following comment in
# FIXME: Hue plugins don't yet quite work with Hadoop 2.X
#Depends: hadoop, bigtop-utils
#Description: Plug-ins for Hadoop to enable integration with Hue
# These plug-ins enable the Hadoop Daemons to communicate with Hue.
# This package must be installed on every node in the Hadoop cluster.
and the similar comment in bigtop-packages/src/rpm/hue/SPECS/hue.spec