Inconsistent message when JAVA_HOME not defined on Windows

1. on Windows install JDK
2. retrieve the ZIP version and extract it
3. issue java -version

   java version "1.8.0_121"
   Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
   Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)
   

4. observe java is in the PATH and returning the version
5. start the nuxeoctl command
6. observe it outputs a message saying it found the nuxeo.conf file defined in NUXEO_CONF and exits with error code 9009

   Found NUXEO_CONF = <YOUR_NUXEO_FOLDER>
   

7. set the JAVA_HOME variable to the JDK folder
8. start the nuxeoctl command
9. observe it now works as expected

Expected behavior: it should return a message saying the JAVA_HOME variable is not defined
Note: without JAVA_HOME defined, nuxeoctl works fine on other OSes