Support SSH key delete for owner

Call the Gerrit delete on-behalf similar to the way AddSshKey is
working so that owners may delete ssh keys if allowSsh is set.

Change-Id: Icecfb61cf329fe1bca95758cff241e308ea60e6d
Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>
1 file changed