More quoting issues

[steve-in-ont]

Statements starting with:
if [ -z ${JAVACMD} ]
... will fail if the Java command path contains spaces. This should probably be changed to:
if [ -z "${JAVACMD}" ]
I count four such statements in the version 2.1.0 release.

[tofi86]

Good catch! You're absolutely right! Thanks for reporting this. I fixed it on develop branch and will release soon.

[tofi86]

This fix has been released with version 3.0.0 right now... Thanks for reporting it 👍