Description of problem:

BRMS ruleflow supports Reusable Subprocess as you can find in business-central Process Designer (See attached ruleflow-business-central.png).

If you use JBDS with BPMN2 Modeler Diagram Editor and select "RuleFlow" profile, you will see:

- "Sub Processes" category is hidden
- There is "Call Activity" in "Tasks" category

(See attached ruleflow-jbds.png)

"Reusable Process" and "Call Activity" are actually the same BPMN node so it doesn't contradict to our support policy. But a bit confusing to users.

I filed this BZ to change it to:

- "Reusable Process" in "Sub Processes" category
- Remove "Call Activity" from "Tasks" category

for RuleFlow profile to be consistent with business-central Process Designer appearance.


Steps to Reproduce:
1. Open a BPMN file with BPMN2 Modeler Diagram Editor in JBDS
2. Select "RuleFlow" in "Palette" view

Actual results:

- "Sub Processes" category is hidden
- There is "Call Activity" in "Tasks" category

Expected results:

- There is "Reusable Process" in "Sub Processes" category
- There is no "Call Activity" in "Tasks" category