Revert Command->Args but remove from yaml where not needed

In the riddler change I changed "command" in the yaml to "args"
but did not change the files. In fact we basically used the
default command everywhere so this did not actually break.

Remove the unnecessary "command" lines to simplify yaml.

Revert the command to args change for now as I think I prefer
command, but its easier to switch now. Need to think if the
entrypoint/command distinction matters before finalizing.

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

test/test.yml

@@ -8,7 +8,6 @@ system:
     binds:
      - /proc/sys/fs/binfmt_misc:/binfmt_misc
     readonly: true
-    command: [/usr/bin/binfmt, -dir, /etc/binfmt.d/, -mount, /binfmt_misc]
   - name: check
     image: "mobylinux/check:c9e41ab96b3ea6a3ced97634751e20d12a5bf52f"
     pid: host

test/virtsock/test-virtsock-server.yml

@@ -22,12 +22,9 @@ daemon:
      - CAP_SYS_ADMIN
     oomScoreAdj: -800
     readonly: true
-    command: [/bin/tini, /usr/sbin/rngd, -f]
   - name: virtsock-server
     image: "mobylinux/test-virtsock:35fea96fd01f6edb67021c494ddf098fdb8bbca0"
     readonly: true
-    command: [/bin/tini, /bin/virtsock_stress, -s, -v, 1]
-
 outputs:
   - format: kernel+initrd
   - format: iso-bios