Output undefined channel for client (#675)

* added null output channel to the client

* potential fix the yarn problems

extensions-modules/package.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "description": "Shared modules for Carbon extensions",
   "dependencies": {
-    "dataprotocol-client": "file:./../dataprotocol-client",
+    "dataprotocol-client": "file:../dataprotocol-client",
     "decompress": "^4.2.0",
     "fs-extra-promise": "^1.0.1",
     "http-proxy-agent": "^2.0.0",

extensions-modules/src/languageservice/serviceClient.ts

@@ -336,7 +336,22 @@ export class SqlToolsServiceClient {
 							configurationSection: SqlToolsServiceClient._constants.extensionConfigSectionName
 						},
 						errorHandler: new LanguageClientErrorHandler(SqlToolsServiceClient._constants),
-						serverConnectionMetadata: this._config.getConfigValue(Constants.serverConnectionMetadata)
+						serverConnectionMetadata: this._config.getConfigValue(Constants.serverConnectionMetadata),
+						outputChannel: {
+							append: () => {
+							},
+							appendLine: () => {
+							},
+							dispose: () => {
+							},
+							clear: () => {
+							},
+							hide: () => {
+							},
+							name: '',
+							show: () => {
+							}
+						}
 					};
 					this._serviceStatus.showServiceLoading();
 					// cache the client instance for later use