Nova and Keystone use openssl to setup certificates. If it's not
there then Keystone fails with "Error 2: No such file or directory",
Nova fails with "openssl: command not found" and glance fails with
"glance: error: argument --os-auth-token: expected one argument"
Basically, cascading errors everywhere. So I put the dependency
in "general" since it affects multiple packages.
Fixes bug 1152315
Change-Id: I803f91644443d7aba78c0a90384e32f6eece36ec
a0f660b0f9