Write the environment file to /results instead of /bmk.

Write the alienv produced environment file to /results/${BASE_WDIR} instead of /bmk. This allows the ALICE container to run in Singularity without needing to pass the '-w' option (/bmk is readonly by default when run in Singularity). This addresses the issue in Jira task BMK-43. I've built a Docker container with this change, and have tested it successfully with both Docker and Singularity.

alice/gen-sim/alice-dpgsim-bmk/alice-dpgsim-bmk.sh

@@ -71,10 +71,10 @@ export BMKDIR=`pwd`
 export BASE_WDIR=${RESULTS_DIR}/${APP}-n${ncopies}-e${nevents}-${DATETAG}_$(((RANDOM%9000)+1000))
 echo "BASE WORKING DIR=$BASE_WDIR"
 
+mkdir -p ${BASE_WDIR}
+/cvmfs/alice.cern.ch/bin/alienv printenv VO_ALICE@AliDPG::prod-201901-02-1,VO_ALICE@AliPhysics::v5-09-45a-01-1 &>${BASE_WDIR}/environment
 
-/cvmfs/alice.cern.ch/bin/alienv printenv VO_ALICE@AliDPG::prod-201901-02-1,VO_ALICE@AliPhysics::v5-09-45a-01-1 &>environment
-
-source environment
+source ${BASE_WDIR}/environment
 
 
 for i in `seq 1 $ncopies`;