[7.3.beta] Development Guide: Statements containing product version - need verification

1. While verifying the statements containing product versions, jperkins-rhn thought the list of project codes used in JBoss EAP in the Development Guide [1] might not be very useful for the customers. After discussing further with rhn-support-bmaxwell and nicole.engard, it was decided to remove the project codes and create another jira [2] for adding a link to the long list of all error codes in EAP, so that the customers can refer to the list when needed.
2. bilge suggested adding the Jakarta EE statement to the Development Guide.

[1] https://doc-stage.usersys.redhat.com/documentation/en-us/jboss_enterprise_application_platform_continuous_delivery/18/single/development_guide/#project_codes_used_in_eap
[2] JBEAP-17531