Update the timeout of argument completer to 10s (#445)

Author: wyunchi-ms

src/ResourceManager/Version2016_09_01/ArgumentCompleters/LocationCompleter.cs

@@ -34,7 +34,7 @@ public class LocationCompleterAttribute : ArgumentCompleterAttribute
     {
         private static IDictionary<int, IDictionary<string, ICollection<string>>> _resourceTypeLocationDictionary = new ConcurrentDictionary<int, IDictionary<string, ICollection<string>>>();
         private static readonly object _lock = new object();
-        private static int _timeout = 3;
+        private static int _timeout = 10;
 
         protected static IDictionary<string, ICollection<string>> ResourceTypeLocationDictionary
         {

src/ResourceManager/Version2016_09_01/ArgumentCompleters/ResourceGroupCompleter.cs

@@ -33,7 +33,7 @@ public class ResourceGroupCompleterAttribute : ArgumentCompleterAttribute
     {
         private static IDictionary<int, IList<String>> _resourceGroupNamesDictionary = new ConcurrentDictionary<int, IList<string>>();
         private static readonly object _lock = new object();
-        public static int _timeout = 3;
+        public static int _timeout = 10;
 
         protected static IList<String> ResourceGroupNames
         {

src/ResourceManager/Version2016_09_01/ArgumentCompleters/ResourceNameCompleter.cs

@@ -36,7 +36,7 @@ namespace Microsoft.Azure.Commands.ResourceManager.Common.ArgumentCompleters
     /// </summary>
     public class ResourceNameCompleterAttribute : ArgumentCompleterAttribute
     {
-        private static int _timeout = 3;
+        private static int _timeout = 10;
 
         /// <summary>
         /// Pass in a list of ResourceTypes and this class will provide a list of locations that are common to all ResourceTypes given. This will then be available to the user to tab through.

src/ResourceManager/Version2016_09_01/ArgumentCompleters/ResourceTypeCompleter.cs

@@ -33,7 +33,7 @@ public class ResourceTypeCompleterAttribute : ArgumentCompleterAttribute
     {
         private static IDictionary<int, IList<String>> _resourceTypesDictionary = new ConcurrentDictionary<int, IList<string>>();
         private static readonly object _lock = new object();
-        public static int _timeout = 3;
+        public static int _timeout = 10;
 
         protected static IList<String> ResourceTypes
         {

src/ResourceManager/Version2016_09_01/ArgumentCompleters/ScopeCompleter.cs

@@ -30,7 +30,7 @@ public class ScopeCompleterAttribute : ArgumentCompleterAttribute
     {
         public static IDictionary<int, IList<string>> _scopeDictionary = new ConcurrentDictionary<int, IList<string>>();
         private static readonly object _lock = new object();
-        public static int _timeout = 3;
+        public static int _timeout = 10;
 
         protected static IList<String> Scopes
         {