move sleep in admin buildpack
move sleep in admin buildpack

This should make the test less flaky since it will allow
loggregator more time to pick up the message and show it to the CLI

Signed-off-by: Jenny Chou <a78eaa530c7727ae294e18b69c08f3d82f05d404@pivotallabs.com>

matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests,matt-royal/cf-acceptance-tests