BATS tests - get working again

Various small fixes to get BATS tests working again.
Split from #2947 because that one keeps getting stalled,
and I'm hoping these separate changes get approved.

I consider these changes urgent because RHEL8 gating
tests are failing, and will fail even more if/when #2272
gets picked up and packaged for RHEL8, and I consider
it important to have clean passing tests for RHEL8.

  * info test: 'insecure registries' is gone. A recent
    commit (d1a7378aa) changed the format of 'podman info',
    removing the 'insecure registries' key. Deal with it.

  * info test: remove check for .host.{Conmon,OCIRuntime}.package;
    the value on f28 and f29 is 'Unknown' (instead of an NVR).
    We can live without this check.

  * 'load' test: skip when running in CI, because stdin
    is not a tty.

  * container restore: fix arg processing. #2272 broke argument
    processing: 'podman container restore', with no args, should
    exit with 'argument required' error. Root cause is that the
    new --import option takes the place of an argument, so the
    checkAllAndLatest() call had to be changed to not exit on error.
    Workaround is (sigh) to copy/paste the skipped checkAllAndLatest()
    code, with minor tweaks to accommodate --import.

Signed-off-by: Ed Santiago <santiago@redhat.com>

cmd/podman/restore.go

@@ -79,5 +79,14 @@ func restoreCmd(c *cliconfig.RestoreValues, cmd *cobra.Command) error {
 	if (c.Import != "") && (c.All || c.Latest) {
 		return errors.Errorf("Cannot use --import and --all or --latest at the same time")
 	}
+
+	argLen := len(c.InputArgs)
+	if (c.All || c.Latest) && argLen > 0 {
+		return errors.Errorf("no arguments are needed with --all or --latest")
+	}
+	if argLen < 1 && !c.All && !c.Latest && c.Import == "" {
+		return errors.Errorf("you must provide at least one name or id")
+	}
+
 	return runtime.Restore(getContext(), c, options)
 }

test/system/005-info.bats

@@ -14,7 +14,7 @@ Distribution:
 OCIRuntime:\\\s\\\+package:
 os:
 rootless:
-insecure registries:
+registries:
 store:
 GraphDriverName:
 GraphRoot:
@@ -37,9 +37,7 @@ RunRoot:
 
     tests="
 host.BuildahVersion       | [0-9.]
-host.Conmon.package       | $expr_nvr
 host.Conmon.path          | $expr_path
-host.OCIRuntime.package   | $expr_nvr
 host.OCIRuntime.path      | $expr_path
 store.ConfigFile          | $expr_path
 store.GraphDriverName     | [a-z0-9]\\\+\\\$

test/system/120-load.bats

@@ -87,6 +87,10 @@ verify_iid_and_name() {
 
 
 @test "podman load - will not read from tty" {
+    if [ ! -t 0 ]; then
+        skip "STDIN is not a tty"
+    fi
+
     run_podman 125 load
     is "$output" \
        "Error: cannot read from terminal. Use command-line redirection" \