[hotfix] Always explicitly set hadoop.version in create_binary_release

Before, the "hadoop2" profile would create a binary release for whatever
happens to be the default hadoop.version.
diff --git a/tools/releasing/create_binary_release.sh b/tools/releasing/create_binary_release.sh
index 42b5a8e..3b1508e 100755
--- a/tools/releasing/create_binary_release.sh
+++ b/tools/releasing/create_binary_release.sh
@@ -78,7 +78,7 @@
 
 
 if [ "$SCALA_VERSION" == "none" ] && [ "$HADOOP_VERSION" == "none" ]; then
-  make_binary_release "hadoop2" "" "2.11"
+  make_binary_release "hadoop24" "-Dhadoop.version=2.4.1" "2.11"
   make_binary_release "hadoop26" "-Dhadoop.version=2.6.5" "2.11"
   make_binary_release "hadoop27" "-Dhadoop.version=2.7.3" "2.11"
   make_binary_release "hadoop28" "-Dhadoop.version=2.8.0" "2.11"
@@ -87,7 +87,7 @@
   make_binary_release "hadoop2" "-Dhadoop.version=$HADOOP_VERSION" "2.11"
 elif [ "$SCALA_VERSION" != none ] && [ "$HADOOP_VERSION" == "none" ]
 then
-  make_binary_release "hadoop2" "" "$SCALA_VERSION"
+  make_binary_release "hadoop24" "-Dhadoop.version=2.4.1" "$SCALA_VERSION"
   make_binary_release "hadoop26" "-Dhadoop.version=2.6.5" "$SCALA_VERSION"
   make_binary_release "hadoop27" "-Dhadoop.version=2.7.3" "$SCALA_VERSION"
   make_binary_release "hadoop28" "-Dhadoop.version=2.8.0" "$SCALA_VERSION"