Version 1.4 param_apm_prefix is empty by default

Version 1.4, Default property "param_apm_prefix" is now empty by default because you can't remove it with empty value but easily add no empty value e.g: -Jparam_apm_prefix=TR_

Version 1.3

Version 1.3 Change method name replace elk with elastic

Version 1.2

Version 1.2 Change project name. Globally replace elk with elastic