Disable StandaloneKCFTests (#5140)

The only test case being run (invoke a blocking action
and get a result) fails quite frequently when run in
a travis-ci environment.  It appears we usually hit the
60 second timeout and return a 202 with the activation id
instead of the expected result.  This is "ok", but the test
is not prepared to handle it.

An alternative would be to modify the test to also accept a 202
response and then poll until the result was available, but that
would take significantly more work.

Author: dgrove-oss

tests/src/test/scala/org/apache/openwhisk/standalone/StandaloneKCFTests.scala

@@ -42,7 +42,8 @@ class StandaloneKCFTests
 
   override protected def useMockServer = false
 
-  override protected def supportedTests = Set("Wsk Action REST should invoke a blocking action and get only the result")
+  // override protected def supportedTests = Set("Wsk Action REST should invoke a blocking action and get only the result") // disabled; very frequently fails in travis-ci because after 60 seconds we return a 202 with the activation id.  KCF often gets cold starts > 60 seconds in travis environment
+  override protected def supportedTests = Set()
 
   override protected def extraArgs: Seq[String] = Seq("--dev-mode", "--dev-kcf")