Added the Self Serve Data Model (#367)

* added recursion and inition decorators

* working version

* added todo comment and removed console.log

* Added Recursive add

* removed type requirement

* proper resolution of promises

* added custom element and base class

* Made selfServe standalone page

* Added custom renderer as async type

* Added overall defaults

* added inital open from data explorer

* removed landingpage

* added feature for self serve type

* renamed sqlx->example and added invalid type

* Added comments for Example

* removed unnecessary changes

* Resolved PR comments

Added tests
Moved onSubmt and initialize inside base class
Moved testExplorer to separate folder
made fields of SelfServe Class non static

* fixed lint errors

* fixed compilation errors

* Removed reactbinding changes

* renamed dropdown -> choice

* Added SelfServeComponent

* Addressed PR comments

* merged master

* added selfservetype.none for emulator and hosted experience

* fixed formatting errors

* Removed "any" type

* undid package.json changes

test/testExplorer/TestExplorerParams.ts

@@ -0,0 +1,10 @@
+export enum TestExplorerParams {
+  notebooksTestRunnerTenantId = "notebooksTestRunnerTenantId",
+  notebooksTestRunnerClientId = "notebooksTestRunnerClientId",
+  notebooksTestRunnerClientSecret = "notebooksTestRunnerClientSecret",
+  portalRunnerDatabaseAccount = "portalRunnerDatabaseAccount",
+  portalRunnerDatabaseAccountKey = "portalRunnerDatabaseAccountKey",
+  portalRunnerSubscripton = "portalRunnerSubscripton",
+  portalRunnerResourceGroup = "portalRunnerResourceGroup",
+  selfServeType = "selfServeType"
+}