Improvement: Hash-keyed Try-It-Out parameter value storage (#4670)

* allow param update by identity + hashed value storage

* add specActions.changeParamByIdentity

* add identity-based lookup support in spec selectors

* migrate `changeParam` usage to `changeParamByIdentity`

* migrate usage of `parameterWithMeta` to `parameterWithMetaByIdentity`

* update invocations of `changeParamByIdentity` to match fn signature

* use OrderedMap throughout hash-based selectors for consistency

* normalize usage of ParameterRow `onChange`

* migrate bug 4557 tests to reflect new ParameterRow interface

* remove exclusive test blocks

* linter fixes

* copy Parameters changes into OAS3 wrapper

* use rawParam for meta lookups in ParameterRow

test/core/plugins/spec/actions.js

@@ -1,7 +1,7 @@
 /* eslint-env mocha */
 import expect, { createSpy } from "expect"
 import { fromJS } from "immutable"
-import { execute, executeRequest } from "corePlugins/spec/actions"
+import { execute, executeRequest, changeParamByIdentity } from "corePlugins/spec/actions"
 
 describe("spec plugin - actions", function(){
 
@@ -184,4 +184,27 @@ describe("spec plugin - actions", function(){
   it.skip("should call errActions.newErr, if the fn.execute rejects", function(){
   })
 
+  describe("changeParamByIdentity", function () {
+    it("should map its arguments to a payload", function () {
+      const pathMethod = ["/one", "get"]
+      const param = fromJS({
+        name: "body",
+        in: "body"
+      })
+      const value = "my value"
+      const isXml = false
+
+      const result = changeParamByIdentity(pathMethod, param, value, isXml)
+
+      expect(result).toEqual({
+        type: "spec_update_param",
+        payload: {
+          path: pathMethod,
+          param,
+          value,
+          isXml
+        }
+      })
+    })
+  })
 })