FENNEL: remove dollar sign from JAVA_HOME error message ("...but  is not set" isn't very helpful)
FENNEL: remove dollar sign from JAVA_HOME error message ("...but  is not set" isn't very helpful)

[git-p4: depot-paths = "//open/dt/dev/": change = 3034]

LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb