MSRC: Fixes dummy account endpoint and keys in tests (#5437)

## Description
Renaming cosmos endpoints and keys to dummy endpoint in unit tests. So
that it won't be caught up in MSRC.

Author: sourabh1007

Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/ActiveClientDiagnosticTest.cs

@@ -12,7 +12,7 @@ namespace Microsoft.Azure.Cosmos.Tests
     [TestClass]
     public class ActiveClientDiagnosticTest
     {
-        private const string ConnectionString = "AccountEndpoint=https://localtestcosmos.documents.azure.com:443/;AccountKey=425Mcv8CXQqzRNCgFNjIhT424GK99CKJvASowTnq15Vt8LeahXTcN5wt3342vQ==;";
+        private const string ConnectionString = "AccountEndpoint=https://example.documents.azure.com:443/;AccountKey=NotRealKey==;";
 
         [TestInitialize]
         public void Initialize()

Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/CosmosClientOptionsUnitTests.cs

@@ -26,7 +26,7 @@ namespace Microsoft.Azure.Cosmos.Tests
     public class CosmosClientOptionsUnitTests
     {
         public const string AccountEndpoint = "https://localhost:8081/";
-        public const string ConnectionString = "AccountEndpoint=https://localtestcosmos.documents.azure.com:443/;AccountKey=425Mcv8CXQqzRNCgFNjIhT424GK99CKJvASowTnq15Vt8LeahXTcN5wt3342vQ==;";
+        public const string ConnectionString = "AccountEndpoint=https://example.documents.azure.com:443/;AccountKey=NotRealKey==;";
         public Func<HttpClient> HttpClientFactoryDelegate = () => new HttpClient();
 
         [TestMethod]
@@ -707,15 +707,15 @@ public void ThrowOnNullConnectionString()
         [ExpectedException(typeof(ArgumentException))]
         public void ThrowOnMissingAccountKeyInConnectionString()
         {
-            string invalidConnectionString = "AccountEndpoint=https://localtestcosmos.documents.azure.com:443/;";
+            string invalidConnectionString = "AccountEndpoint=https://example.documents.azure.com:443/;";
             new CosmosClientBuilder(invalidConnectionString);
         }
 
         [TestMethod]
         [ExpectedException(typeof(ArgumentException))]
         public void ThrowOnMissingAccountEndpointInConnectionString()
         {
-            string invalidConnectionString = "AccountKey=425Mcv8CXQqzRNCgFNjIhT424GK99CKJvASowTnq15Vt8LeahXTcN5wt3342vQ==;";
+            string invalidConnectionString = "AccountKey=NotRealKey==;";
             new CosmosClientBuilder(invalidConnectionString);
         }
 
@@ -760,7 +760,7 @@ public void VerifyHttpClientFactoryBlockedWithConnectionLimit()
         public void VerifyHttpClientHandlerIsSet()
         {
             string endpoint = AccountEndpoint;
-            string key = "425Mcv8CXQqzRNCgFNjIhT424GK99CKJvASowTnq15Vt8LeahXTcN5wt3342vQ==";
+            string key = "NotRealKey==";
 
             IWebProxy webProxy = new TestWebProxy();
 

Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/CosmosClientTests.cs

@@ -29,7 +29,7 @@ namespace Microsoft.Azure.Cosmos.Tests
     public class CosmosClientTests
     {
         public const string AccountEndpoint = "https://localhost:8081/";
-        public const string ConnectionString = "AccountEndpoint=https://localtestcosmos.documents.azure.com:443/;AccountKey=425Mcv8CXQqzRNCgFNjIhT424GK99CKJvASowTnq15Vt8LeahXTcN5wt3342vQ==;";
+        public const string ConnectionString = "AccountEndpoint=https://example.documents.azure.com:443/;AccountKey=NotRealKey==;";
 
         [TestMethod]
         public async Task TestDispose()
@@ -74,7 +74,7 @@ public async Task TestDispose()
                 catch (CosmosObjectDisposedException e)
                 {
                     string expectedMessage = $"Cannot access a disposed 'CosmosClient'. Follow best practices and use the CosmosClient as a singleton." +
-                        $" CosmosClient was disposed at: {cosmosClient.DisposedDateTimeUtc.Value.ToString("o", CultureInfo.InvariantCulture)}; CosmosClient Endpoint: https://localtestcosmos.documents.azure.com/; Created at: {cosmosClient.ClientConfigurationTraceDatum.ClientCreatedDateTimeUtc.ToString("o", CultureInfo.InvariantCulture)}; UserAgent: {userAgent};";
+                        $" CosmosClient was disposed at: {cosmosClient.DisposedDateTimeUtc.Value.ToString("o", CultureInfo.InvariantCulture)}; CosmosClient Endpoint: https://example.documents.azure.com/; Created at: {cosmosClient.ClientConfigurationTraceDatum.ClientCreatedDateTimeUtc.ToString("o", CultureInfo.InvariantCulture)}; UserAgent: {userAgent};";
                     Assert.IsTrue(e.Message.Contains(expectedMessage));
                     string diagnostics = e.Diagnostics.ToString();
                     Assert.IsNotNull(diagnostics);