add new Juniper/Unisphere/ERX VSAs

add new Juniper/Unisphere/ERX VSAs

Importing new attributes from
https://www.juniper.net/documentation/software/junos/junos161/radius-dictionary/unisphereDictionary_for_JUNOS_v16-1.dct
using the exact attribute names Juniper use, following the precedence set
by the original conversion from dictionary.erx to dictionary.unisphere

Yes, Juniper *do* use four different attributes prefixes here:
 Unisphere, Pcp (sic), Jnpr and ERX(!)

Quite impressive.  And quite a mess.  But at least it's not *our* mess
if we just got with their names...

Signed-off-by: Bjørn Mork <bjorn@mork.no>