Add tests from the old svn tree

We're losing the svn history (which we could probably keep if we tried
hard enough) but don't consider that worthwhile.

Note these tests are destructive, so run them only in a throwaway
environment like a chroot, container, or vm.

The tests/run.all script should be the one which launches all the tests.

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>

tests/chage/03_chsh_usage/data/usage.out

@@ -0,0 +1,16 @@
+Usage: chage [options] LOGIN
+
+Options:
+  -d, --lastday LAST_DAY        set date of last password change to LAST_DAY
+  -E, --expiredate EXPIRE_DATE  set account expiration date to EXPIRE_DATE
+  -h, --help                    display this help message and exit
+  -I, --inactive INACTIVE       set password inactive after expiration
+                                to INACTIVE
+  -l, --list                    show account aging information
+  -m, --mindays MIN_DAYS        set minimum number of days before password
+                                change to MIN_DAYS
+  -M, --maxdays MAX_DAYS        set maximim number of days before password
+                                change to MAX_DAYS
+  -R, --root CHROOT_DIR         directory to chroot into
+  -W, --warndays WARN_DAYS      set expiration warning days to WARN_DAYS
+