Make the nfsdriver drain script timeout after 10 seconds
Make the nfsdriver drain script timeout after 10 seconds

[#165747144] https://www.pivotaltracker.com/story/show/165747144

Signed-off-by: Anjali Verma <52f61d09f81ea54acb61bd0aa71c1289e54f7127@emc.com>
Co-authored-by: Anjali Verma <52f61d09f81ea54acb61bd0aa71c1289e54f7127@emc.com>

cloudfoundry-incubator/nfs-volume-release,cloudfoundry-incubator/nfs-volume-release,cloudfoundry-incubator/nfs-volume-release