Upload jar files: Java commands are JAVA_ARGS not the purported container command

Description of problem:

When a user uploads a jar file the form shows an input for the "Java commands" (which should be "Java command" if this is the cli command).

But this field doesn't set the Java command (container command) as expected or purport. It sets the environment variable JAVA_ARGS instead. This could confuse users which expect to set a java command like "java -jar ... -port 8080 -otherParameter true" here.

Prerequisites (if any, like setup, operators/versions):

None

Steps to Reproduce

1. Open developer perspective
2. Add page > Upload jar file

Actual results:

JAVA_ARGS environment variable field is labeled as "Java commands"

Expected results:

If setting the JAVA_ARGS as environment variables works fine for our users (instead of setting the container command), the field should be labeled as "Java arguments (JAVA_ARGS)".

Reproducibility (Always/Intermittent/Only Once):

Always

Build Details:

4.8 and 4.9 master

Additional info:

None