Change safe_while defaults to 6s 10x no increment

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Update safe_while users to reflect new defaults

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Add optional 'action' parameter to safe_while

This is to make it easier to see what actually timed out when scanning
error logs

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Use safe_while's action arg

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Merge pull request #219 from ceph/wip-safe-while-tweak

Changes to safe_while