Refactor error handling in data explorer Part 3 (#315)

- Make sure we pass the error message string instead of an error object when we call `TelemetryProcessor.traceFailure` since TelemetryProcessor will call `JSON.stringify` on the error object which would result in an empty object
- Removed ErrorParserUtility since it only works on specific error types. We can just log the full error message and manually derive information we need from the message.
- Added option to include stack trace in `getErrorMessage`. This is useful for figuring out where the client side script errors are coming from.
- Some minor refactors

src/Explorer/Tabs/UserDefinedFunctionTab.ts

@@ -7,6 +7,7 @@ import { Action } from "../../Shared/Telemetry/TelemetryConstants";
 import * as TelemetryProcessor from "../../Shared/Telemetry/TelemetryProcessor";
 import UserDefinedFunction from "../Tree/UserDefinedFunction";
 import ScriptTabBase from "./ScriptTabBase";
+import { getErrorMessage, getErrorStack } from "../../Common/ErrorHandlingUtils";
 
 export default class UserDefinedFunctionTab extends ScriptTabBase {
   public collection: ViewModels.Collection;
@@ -68,7 +69,9 @@ export default class UserDefinedFunctionTab extends ScriptTabBase {
               databaseAccountName: this.collection && this.collection.container.databaseAccount().name,
               defaultExperience: this.collection && this.collection.container.defaultExperience(),
               dataExplorerArea: Constants.Areas.Tab,
-              tabTitle: this.tabTitle()
+              tabTitle: this.tabTitle(),
+              error: getErrorMessage(createError),
+              errorStack: getErrorStack(createError)
             },
             startKey
           );
@@ -143,7 +146,9 @@ export default class UserDefinedFunctionTab extends ScriptTabBase {
               databaseAccountName: this.collection && this.collection.container.databaseAccount().name,
               defaultExperience: this.collection && this.collection.container.defaultExperience(),
               dataExplorerArea: Constants.Areas.Tab,
-              tabTitle: this.tabTitle()
+              tabTitle: this.tabTitle(),
+              error: getErrorMessage(createError),
+              errorStack: getErrorStack(createError)
             },
             startKey
           );