Description of problem:
If you try to run "debuginfo-install <package>" while yum is being used (for example, by PackageKit) it fails, and does not wait for the yum lock like some other tools do.

Version-Release number of selected component (if applicable):
1.1.23-3.fc12

How reproducible:
Always

Steps to Reproduce:
1. Run a program that uses yum
2. Run "debuginfo-install <package>"
3. Watch it fail.
  
Actual results:
'Another application is holding the yum lock, cannot continue' message, and it exits

Expected results:
debuginfo-intall tells me that another program holds the yum lock, and it tries again periodically until it can acquire the lock.