Properly check group membership
Properly check group membership

If an xAPI record did not contain a group it was considered part of the group

thexerteproject/xerteonlinetoolkits,torinfo/xerteonlinetoolkits,torinfo/xerteonlinetoolkits,torinfo/xerteonlinetoolkits,thexerteproject/xerteonlinetoolkits,thexerteproject/xerteonlinetoolkits,thexerteproject/xerteonlinetoolkits,torinfo/xerteonlinetoolkits,torinfo/xerteonlinetoolkits,thexerteproject/xerteonlinetoolkits