Description of problem:
run 'rhc app tidy' against an application of ruby-1.8 and ruby-1.9, the log files is not cleaned up, only clean up tmp files.

Version-Release number of selected component (if applicable):
on devenv_2756
rhc-1.4.3

How reproducible:
Always

Steps to Reproduce:
1. Create a ruby application 
rhc app create ruby800 ruby-1.8
2. Ssh into app's gear, create log files
touch ${OPENSHIFT_RUBY_LOG_DIR}test.log
3. Clean up application with rhc 
rhc app tidy ruby800
  
Actual results:
RESULT:
ruby800 cleaned up

But log files are still present
[ruby800-ddy.dev.rhcloud.com ~]\> ls ${OPENSHIFT_RUBY_LOG_DIR}
production.log  error_log-20130201-000000-EST access_log-20130201-000000-EST  test.log

Expected results:
log files should be cleaned up

Additional info:
the following app type can work well:
perl-5.10
php-5.3
jbossas-7
jbosseap-6.0