Add testcase

Add a testcase to bind mount a filesystem that is ro, nodev, noexec, nosuid
without providing ro, nodev, noexec, nosuid in the initial mount.
Try to remount with these options afterwards.

Signed-off-by: Ruediger Pluem <ruediger.pluem@vodafone.com>

tests/integration/mounts_sshfs.bats

@@ -12,7 +12,7 @@ function setup() {
 	DIR="$BATS_RUN_TMPDIR/fuse-sshfs"
 	mkdir -p "$DIR"
 
-	if ! $sshfs -o ro rootless@localhost: "$DIR"; then
+	if ! $sshfs -o ro,nodev,nosuid,noexec rootless@localhost: "$DIR"; then
 		skip "test requires working sshfs mounts"
 	fi
 
@@ -33,7 +33,7 @@ function teardown() {
 					type: "bind",
 					source: "'"$DIR"'",
 					destination: "/mnt",
-					options: ["rw", "rprivate", "nosuid", "nodev", "rbind"]
+					options: ["rw", "rprivate", "rbind"]
 				}]'
 
 	runc run test_busybox