HUE-2460 [impala] Update syntax highlighting to include 2.0 analytic functions

Updated editor to syntax hightlight Impala analytic functions
HUE-2467 [fb] Sentry NameNode plugin integration

Backend part, providing a 'is_sentry_managed' flag for each view
HUE-2458 [core] make libsaml backwards compatible with abec's saml2 forks
HUE-2458 [core] don't rely on saml2 being installed in the libsaml config
HUE-2458 [core] fix an import bug