Sleep longer for the 389ds container tests

the Tumbleweed containers are build as OCI images, so "HEALTHCHECK" is
not implemented anymore. we still however need to wait for the container
to finish initalization.

tests/test_389ds.py

@@ -1,5 +1,8 @@
 """Basic tests for the 389-ds Application container image."""
 from pytest_container.runtime import LOCALHOST
+from tenacity import retry
+from tenacity import stop_after_delay
+from tenacity import wait_fixed
 
 from bci_tester.data import CONTAINER_389DS_CONTAINERS
 
@@ -8,6 +11,19 @@
 
 
 def test_ldapwhoami(auto_container_per_test):
+    # Wait for the container to have started up. This is
+    # done as a HEALTHCHECK, but HEALTHCHECKs do not exist
+    # in OCI container builds
+    # https://github.com/opencontainers/image-spec/issues/749
+
+    @retry(wait=wait_fixed(5), stop=stop_after_delay(60))
+    def wait_liveness():
+        auto_container_per_test.connection.run_expect(
+            [0], "/usr/lib/dirsrv/dscontainer -H"
+        )
+
+    wait_liveness()
+
     auto_container_per_test.connection.run_expect(
         [0],
         "dsconf localhost backend create --suffix dc=example,dc=com --be-name userRoot",