Fix flaky OOM tests

If cgroup swap memory limit isn't enabled, then
the -m flag doesn't work and the container that is created for
both of these tests is very large. Because we are trying to run the
containers out of memory, this takes a very long time and causes the
tests to fail most of the time.

Follow-up to #17913

Signed-off-by: Christopher Jones <tophj@linux.vnet.ibm.com>

integration-cli/docker_cli_events_unix_test.go

@@ -46,7 +46,7 @@ func (s *DockerSuite) TestEventsRedirectStdout(c *check.C) {
 }
 
 func (s *DockerSuite) TestEventsOOMDisableFalse(c *check.C) {
-	testRequires(c, DaemonIsLinux, oomControl, memoryLimitSupport, NotGCCGO)
+	testRequires(c, DaemonIsLinux, oomControl, memoryLimitSupport, NotGCCGO, swapMemorySupport)
 
 	errChan := make(chan error)
 	go func() {
@@ -76,7 +76,7 @@ func (s *DockerSuite) TestEventsOOMDisableFalse(c *check.C) {
 }
 
 func (s *DockerSuite) TestEventsOOMDisableTrue(c *check.C) {
-	testRequires(c, DaemonIsLinux, oomControl, memoryLimitSupport, NotGCCGO, NotArm)
+	testRequires(c, DaemonIsLinux, oomControl, memoryLimitSupport, NotGCCGO, NotArm, swapMemorySupport)
 
 	errChan := make(chan error)
 	observer, err := newEventObserver(c)