Parse elasticsearch.in.sh before setting JAVA dir as we could define JAVA_HOME in elasticsearch.in.sh

bin/elasticsearch

@@ -68,12 +68,6 @@ ES_HOME=`dirname "$SCRIPT"`/..
 ES_HOME=`cd "$ES_HOME"; pwd`
 
 
-if [ -x "$JAVA_HOME/bin/java" ]; then
-    JAVA=$JAVA_HOME/bin/java
-else
-    JAVA=`which java`
-fi
-
 # If an include wasn't specified in the environment, then search for one...
 if [ "x$ES_INCLUDE" = "x" ]; then
     # Locations (in order) to use when searching for an include file.
@@ -92,6 +86,12 @@ elif [ -r "$ES_INCLUDE" ]; then
     . "$ES_INCLUDE"
 fi
 
+if [ -x "$JAVA_HOME/bin/java" ]; then
+    JAVA=$JAVA_HOME/bin/java
+else
+    JAVA=`which java`
+fi
+
 if [ -z "$ES_CLASSPATH" ]; then
     echo "You must set the ES_CLASSPATH var" >&2
     exit 1