Address comments and fix test

Author: neha-bhargava

msal4j-sdk/src/main/java/com/microsoft/aad/msal4j/Constants.java

@@ -30,7 +30,7 @@ final class Constants {
     public static final String TOKEN_HASH_CLAIM = "token_sha256_to_refresh";
     public static final String CLIENT_CAPABILITY_REQUEST_PARAM = "xms_cc";
 
-    // Only Service Fabric and App Service managed identity environments support token revocation
+    // Only Service Fabric managed identity environments support token revocation
     public static final Set<ManagedIdentitySourceType> TOKEN_REVOCATION_SUPPORTED_ENVIRONMENTS = new HashSet<ManagedIdentitySourceType>() {{
         add(ManagedIdentitySourceType.SERVICE_FABRIC);
     }};

msal4j-sdk/src/main/java/com/microsoft/aad/msal4j/StringHelper.java

@@ -49,7 +49,7 @@ static private String createSha256Hash(String stringToHash, boolean base64Encode
      * @return The SHA-256 hash of the string as a lowercase hex string
      * @throws MsalClientException If the SHA-256 algorithm is not available
      */
-    public static String createSha256HashHexString(String stringToHash) {
+    static String createSha256HashHexString(String stringToHash) {
         if (stringToHash == null || stringToHash.isEmpty()) {
             throw new IllegalArgumentException("String to hash cannot be null or empty");
         }
@@ -74,7 +74,7 @@ public static String createSha256HashHexString(String stringToHash) {
         }
     }
 
-    public static boolean isNullOrBlank(final String str) {
+    static boolean isNullOrBlank(final String str) {
         return str == null || str.trim().length() == 0;
     }
 }

msal4j-sdk/src/test/java/com/microsoft/aad/msal4j/ManagedIdentityTests.java

@@ -722,7 +722,7 @@ void managedIdentityTest_WithCapabilitiesOnly(ManagedIdentitySourceType source,
         assertNotNull(result.accessToken());
         assertEquals(TokenSource.CACHE, result.metadata().tokenSource());
 
-        verify(httpClientMock, times(2)).send(any());
+        verify(httpClientMock, times(1)).send(any());
     }
 
     @ParameterizedTest