Only collect test xml where it exists
Only collect test xml where it exists

Patch by marcuse; reviewed by Eduard Tudenhoefner for CASSANDRA-13807

Instagram/cassandra,clohfink/cassandra,ollie314/cassandra,pauloricardomg/cassandra,clohfink/cassandra,belliottsmith/cassandra,jrwest/cassandra,aweisberg/cassandra,aboudreault/cassandra,krummas/cassandra,strapdata/cassandra,bcoverston/cassandra,apache/cassandra,mshuler/cassandra,belliottsmith/cassandra,instaclustr/cassandra,kgreav/cassandra,Instagram/cassandra,jeromatron/cassandra,scylladb/scylla-tools-java,WorksApplications/cassandra,ifesdjeen/cassandra,szhou1234/cassandra,aweisberg/cassandra,WorksApplications/cassandra,ptnapoleon/cassandra,mshuler/cassandra,mshuler/cassandra,aboudreault/cassandra,juiceblender/cassandra,pauloricardomg/cassandra,tommystendahl/cassandra,michaelsembwever/cassandra,jasonstack/cassandra,cooldoger/cassandra,stef1927/cassandra,tjake/cassandra,mike-tr-adamson/cassandra,snazy/cassandra,ptnapoleon/cassandra,jeffjirsa/cassandra,aboudreault/cassandra,szhou1234/cassandra,snazy/cassandra,driftx/cassandra,snazy/cassandra,spodkowinski/cassandra,pauloricardomg/cassandra,strapdata/cassandra,stef1927/cassandra,ifesdjeen/cassandra,WorksApplications/cassandra,jasobrown/cassandra,bdeggleston/cassandra,blerer/cassandra,tommystendahl/cassandra,beobal/cassandra,thelastpickle/cassandra,mkjellman/cassandra,scylladb/scylla-tools-java,tommystendahl/cassandra,snazy/cassandra,apache/cassandra,chbatey/cassandra-1,kgreav/cassandra,jeffjirsa/cassandra,jbellis/cassandra,juiceblender/cassandra,strapdata/cassandra,scylladb/scylla-tools-java,mike-tr-adamson/cassandra,scylladb/scylla-tools-java,mike-tr-adamson/cassandra,jrwest/cassandra,christian-esken/cassandra,clohfink/cassandra,jasobrown/cassandra,aureagle/cassandra,yukim/cassandra,blambov/cassandra,jeromatron/cassandra,christian-esken/cassandra,ifesdjeen/cassandra,aureagle/cassandra,spodkowinski/cassandra,blambov/cassandra,instaclustr/cassandra,ollie314/cassandra,josh-mckenzie/cassandra,beobal/cassandra,jasonstack/cassandra,stef1927/cassandra,jeffjirsa/cassandra,driftx/cassandra,jasobrown/cassandra,blerer/cassandra,driftx/cassandra,bcoverston/cassandra,blambov/cassandra,DikangGu/cassandra,juiceblender/cassandra,josh-mckenzie/cassandra,mkjellman/cassandra,exoscale/cassandra,jbellis/cassandra,jasobrown/cassandra,krummas/cassandra,Instagram/cassandra,mkjellman/cassandra,apache/cassandra,chbatey/cassandra-1,juiceblender/cassandra,adelapena/cassandra,chbatey/cassandra-1,DikangGu/cassandra,strapdata/cassandra,thelastpickle/cassandra,michaelsembwever/cassandra,DikangGu/cassandra,tommystendahl/cassandra,jeromatron/cassandra,aureagle/cassandra,iamaleksey/cassandra,adelapena/cassandra,bdeggleston/cassandra,szhou1234/cassandra,exoscale/cassandra,josh-mckenzie/cassandra,WorksApplications/cassandra,stef1927/cassandra,blerer/cassandra,bcoverston/cassandra,iamaleksey/cassandra,bcoverston/cassandra,adejanovski/cassandra,mkjellman/cassandra,spodkowinski/cassandra,Instagram/cassandra,jasonstack/cassandra,pauloricardomg/cassandra,belliottsmith/cassandra,ollie314/cassandra,tjake/cassandra,tjake/cassandra,yukim/cassandra,mike-tr-adamson/cassandra,blerer/cassandra,jrwest/cassandra,iamaleksey/cassandra,aweisberg/cassandra,adejanovski/cassandra,jeffjirsa/cassandra,josh-mckenzie/cassandra,iamaleksey/cassandra,christian-esken/cassandra,apache/cassandra,blambov/cassandra,bdeggleston/cassandra,michaelsembwever/cassandra,yukim/cassandra,michaelsembwever/cassandra,exoscale/cassandra,ifesdjeen/cassandra,tjake/cassandra,krummas/cassandra,beobal/cassandra,thelastpickle/cassandra,belliottsmith/cassandra,adejanovski/cassandra,thelastpickle/cassandra,kgreav/cassandra,cooldoger/cassandra,kgreav/cassandra,adelapena/cassandra,cooldoger/cassandra,adelapena/cassandra,jrwest/cassandra,driftx/cassandra,instaclustr/cassandra,krummas/cassandra,mshuler/cassandra,bdeggleston/cassandra,spodkowinski/cassandra,cooldoger/cassandra,yukim/cassandra,jbellis/cassandra,ptnapoleon/cassandra,clohfink/cassandra,aweisberg/cassandra,beobal/cassandra,szhou1234/cassandra,instaclustr/cassandra