[ONOS-3707] Update env to default to Maven 3.3.9

Change-Id: If74cc04fc9f15c90511e78e23662554f41c0ecbc
diff --git a/tools/dev/bash_profile b/tools/dev/bash_profile
index 6bab610..c9bca80 100644
--- a/tools/dev/bash_profile
+++ b/tools/dev/bash_profile
@@ -16,7 +16,7 @@
     fi
 fi
 
-export MAVEN=${MAVEN:-~/Applications/apache-maven-3.3.1}
+export MAVEN=${MAVEN:-~/Applications/apache-maven-3.3.9}
 
 export KARAF_VERSION=${KARAF_VERSION:-3.0.3}
 export KARAF_ROOT=${KARAF_ROOT:-~/Applications/apache-karaf-$KARAF_VERSION}