bugfix: sql server and web app node listing duplicatedly.

Author: shenqianjin

Utils/azure-explorer-common/src/com/microsoft/tooling/msservices/serviceexplorer/azure/sqlserver/SqlServerModule.java

@@ -37,7 +37,7 @@ public SqlServerModule(final Node parent) {
     @Override
     protected void refreshItems() throws AzureCmdException {
         List<ISqlServer> servers = Azure.az(AzureSqlServer.class).sqlServers();
-        servers.parallelStream()
+        servers.stream()
             .filter(server -> Objects.nonNull(server.entity()))
             .map(server -> new SqlServerNode(this, server.entity().getSubscriptionId(), server))
             .forEach(this::addChildNode);

Utils/azure-explorer-common/src/com/microsoft/tooling/msservices/serviceexplorer/azure/webapp/WebAppModule.java

@@ -104,7 +104,7 @@ public void run() {
 
     @Override
     public void renderChildren(@NotNull final List<IWebApp> resourceExes) {
-        resourceExes.parallelStream()
+        resourceExes.stream()
                 .filter(webApp -> StringUtils.isNotEmpty(webApp.id()))
                 .map(webApp -> new WebAppNode(this, Utils.getSubscriptionId(webApp.id()), webApp))
                 .forEach(this::addChildNode);