As admin, I can set the default summary when creating Test Executions from a Test Plan

Currently, when creating a Test Execution from a Test Plan, the default summary filled by Xray is "Test Execution for Test Plan [key]".

Admin users should be able to configure Xray in order to change this message to include for instance the Test Plan issue summary as opposed to the key:

"Test Execution for Test Plan [Summary]".

This can be done by supporting place holders on the message template. Ex:

• $key
• $summary

"Test Execution for Test Plan [$summary]".