Warn users during the upgrade that project keys with numbers are no longer allowed

Currently if you upgrade JIRA from 4.x releases to the latest, all of your projects are properly imported, including those that contain numbers in the Issue Key. In the latest JIRA releases, projects with numbers in the key are no longer allowed to be created, and this can cause problems like:

1. Commits in the SVN will fail with the error:

   commit -m "[SS10-1] Changes to Improve Code Quality for Wiki Documentation - making it so you don't have to hard code the XML list" C:/src/trunk/sdx-mv90-adapter/sdx-mv90-adapter-war/src/test/java/com/landisgyr/sdx/mv90/SmokeTestWithMocksXmlCopyJUnit4Runner.java
   Sending C:/src/trunk/sdx-mv90-adapter/sdx-mv90-adapter-war/src/test/java/com/landisgyr/sdx/mv90/SmokeTestWithMocksXmlCopyJUnit4Runner.java
   Transmitting file data ...
   A repository hook failed
   svn: Commit failed (details follow):
   svn: Commit blocked by pre-commit hook (exit code 1) with output:
   Committer: bherschberger
   Commit message: "[SS10-1] Changes to Improve Code Quality for Wiki Documentation - making it so you don't have to hard code the XML list"
   Commit rejected: No project accepts this commit. Project [SDXADMIN]: Commit message must contain at least one valid issue key. Project [SQ]: Commit message must contain at least one valid issue key. Project [SA]: Commit message must contain at least one valid issue key. Project [SC]: Commit message must contain at least one valid issue key. Project [SS]: Commit message must contain at least one valid issue key. Project [SK]: Commit message must contain at least one valid issue key. Project [SS10]: Commit message must contain at least one valid issue key. Project [SD]: Commit message must contain at least one valid issue key. Project [SX]: Commit message must contain at least one valid issue key.
   

2. Quick Search for the issue key won't work

Please create an advisory/project key renaming possibility to warn users during the upgrade that problems will occur if the project key continues to use numbers.

Workaround

1. Create a new project with a clean project key (only uppercase letters);
2. In the issue navigator, search for all the issues of the SDXMV90 project;
3. In the "Tools" icon on the right corner of the screen, choose the option "all (xx) issue(s)";
   Where 'xx' is the number of issues returned in the search;
4. Choose the "Move Issues" option;
5. Select the project you created in the first step to move the issues to;
6. Finish the bulk operation;