Add the fundamental framework of REST invocation for test cases to re…

…place wsk binary

Almost all the test cases in OpenWhisk are currently running based
on the wsk CLI binary. In order to separate the CLI out of OpenWhisk
core repository, we need to call REST API of OpenWhisk to access
OpenWhisk services instead of calling the wsk CLI binary command.

This PR adds the basic REST implementation for all the test cases
to use. One basic principle is to keep the changes to the existing
test cases as few as possible, so we add WskRest.scala as an equivalent
class to Wsk.scala and WskRestTestHelpers.scala as an equivalent file
to WskTestHelpers.scala for REST.

All the replacement of binary with REST will happen in an increamental fashion.
This PR only changes one existing test case in WskActionTests.scala, and
reimplements it in WskRestActionTests.scala. All the other test cases can follow
the same way to change the test cases one by one. New changes may be necessary
to the basic REST implementation as well in future to accommodate the test cases.

tests/src/test/scala/common/Wsk.scala

@@ -643,7 +643,6 @@ class WskPackage()
         val params = Seq(noun, "bind", "--auth", wp.authKey, fqn(provider), fqn(name)) ++
             { parameters flatMap { p => Seq("-p", p._1, p._2.compactPrint) } } ++
             { annotations flatMap { p => Seq("-a", p._1, p._2.compactPrint) } }
-        println("params is " + params)
         cli(wp.overrides ++ params, expectedExitCode)
     }
 }

tests/src/test/scala/common/WskTestHelpers.scala

@@ -160,6 +160,7 @@ trait WskTestHelpers extends Matchers {
         totalWait: Duration = 30 seconds)(
             check: ActivationResult => Unit)(
                 implicit wskprops: WskProps): Unit = {
+        println("check extractActivationId")
         val activationId = wsk.extractActivationId(run)
 
         withClue(s"did not find an activation id in '$run'") {
@@ -243,7 +244,9 @@ trait WskTestHelpers extends Matchers {
 
     def removeCLIHeader(response: String): String = response.substring(response.indexOf("\n"))
 
-    def getJSONFromCLIResponse(response: String): JsObject = removeCLIHeader(response).parseJson.asJsObject
+    def getJSONFromResponse(response: String, isCli: Boolean): JsObject = {
+        if (isCli) removeCLIHeader(response).parseJson.asJsObject else response.parseJson.asJsObject
+    }
 
     def getAdditionalTestSubject(newUser: String): WskProps = {
         val wskadmin = new RunWskAdminCmd {}
@@ -259,3 +262,6 @@ trait WskTestHelpers extends Matchers {
         }
     }
 }
+
+
+