Add virtualenv install instead of pip

bin/tests/test-2-add-inside-relationship-mapping

@@ -2,6 +2,9 @@
 
 echo "Running test for issue 2 (inside relationship mapping)..."
 
+pip install virtualenv
+virtualenv .venv
+source .venv/bin/activate
 pip install beautifulsoup4==4.9.2
 
 # RZ -- need to set LgEvalDir and PYTHONPATH for
@@ -21,6 +24,7 @@ export PATH=$LgEvalDir/bin:$PATH
 echo "  LgEvalDir    $LgEvalDir"
 echo "  PYTHONPATH   $PYTHONPATH"
 echo "  PATH         $PATH"
+echo ""
 
 TEST_FILES=`ls ../../tests/sqrt_lg/*.lg` 
 for file in $TEST_FILES
@@ -29,3 +33,5 @@ do
   filename=`basename $file .lg`
   echo MathML generated: "$filename".mml
 done
+
+deactivate