Description of problem:
It'll return 'The threaddump command is not supported by this application type.' after executing 'rhc-ctl-app -c threaddump', 'rhc app threaddump' has also the same issue..

Version-Release number of selected component (if applicable):
rhc-0.87.8-1.el6_2.noarch

How reproducible:
Always

Steps to Reproduce:
1. Create ruby app
# rhc app create -a ruby3 -t ruby-1.8

2. using rhc-ctl-app -c threaddump to generate dump file
#rhc app threaddump -a ruby3 .
#rhc-ctl-app -a ruby3 -p xxx -c threaddump

  
Actual results:
It will output error messages said 'The threaddump command is not supported by this application type.'

Expected results:
The command could be executed successfully without anyerror

Additional info:
#rhc app threaddump -a ruby3 -p xxx

RESULT:
The threaddump command is not supported by this application type.