Issue skhatri#25: Adding capability to set JAVA_HOME for jvm in use

sonar-runner-2.4/bin/sonar-runner

@@ -79,13 +79,18 @@ if [ -z "$SONAR_RUNNER_HOME" ] ; then
   SONAR_RUNNER_HOME=`cd "$SONAR_RUNNER_HOME" && pwd`
 fi
 
+if [ ! -z "$JAVA_HOME" ] ; then
+    JAVA_CMD="$JAVA_HOME/bin/java"
+  else
+    JAVA_CMD="`which java`"
+fi
+
 # check that the SONAR_RUNNER_HOME has been correctly set
 if [ ! -f "$SONAR_RUNNER_HOME/lib/sonar-runner-dist-2.4.jar" ] ; then
   echo '$SONAR_RUNNER_HOME' does not point to a valid installation directory: $SONAR_RUNNER_HOME
   exit 1
 fi
 
-JAVA_CMD="`which java`"
 JAR_FILE="${SONAR_RUNNER_HOME}"/lib/sonar-runner-dist-2.4.jar
 PROJECT_HOME=`pwd`