Replace exception with warning

Author: siddhijain

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

@@ -7,6 +7,8 @@
 import lombok.Getter;
 import lombok.NonNull;
 import lombok.experimental.Accessors;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.net.MalformedURLException;
 import java.net.URL;
@@ -41,6 +43,8 @@ public class AuthorizationRequestUrlParameters {
 
     Map<String, List<String>> requestParameters = new HashMap<>();
 
+    Logger log = LoggerFactory.getLogger(AuthorizationRequestUrlParameters.class);
+
     public static Builder builder(String redirectUri,
                                   Set<String> scopes) {
 
@@ -161,7 +165,7 @@ private AuthorizationRequestUrlParameters(Builder builder) {
                 String key = entry.getKey();
                 String value = entry.getValue();
                 if(requestParameters.containsKey(key)){
-                    throw new MsalClientException("Conflicting parameters", "400 - Bad Request");
+                    log.warn("A query parameter {} has been provided with values multiple times.", key);
                 }
                 requestParameters.put(key, Collections.singletonList(value));
             }

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

@@ -34,7 +34,7 @@ class TokenRequestExecutor {
 
     AuthenticationResult executeTokenRequest() throws ParseException, IOException {
 
-        log.debug("Sending token request to: " + requestAuthority.canonicalAuthorityUrl());
+        log.debug("Sending token request to: {}", requestAuthority.canonicalAuthorityUrl());
         OAuthHttpRequest oAuthHttpRequest = createOauthHttpRequest();
         HTTPResponse oauthHttpResponse = oAuthHttpRequest.send();
         return createAuthenticationResultFromOauthHttpResponse(oauthHttpResponse);
@@ -70,7 +70,7 @@ OAuthHttpRequest createOauthHttpRequest() throws SerializeException, MalformedUR
         if(msalRequest.requestContext().apiParameters().extraQueryParameters() != null ){
             for(String key: msalRequest.requestContext().apiParameters().extraQueryParameters().keySet()){
                     if(params.containsKey(key)){
-                        throw new MsalClientException("Conflicting parameters","400 - Bad Request");
+                       log.warn("A query parameter {} has been provided with values multiple times.", key);
                     }
                     params.put(key, Collections.singletonList(msalRequest.requestContext().apiParameters().extraQueryParameters().get(key)));
             }

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

@@ -78,7 +78,7 @@ public void testBuilder_invalidRequiredParameters() {
                         .build();
     }
 
-    @Test(expectedExceptions = MsalClientException.class, expectedExceptionsMessageRegExp = "Conflicting parameters")
+    @Test
     public void testBuilder_conflictingParameters() {
         PublicClientApplication app = PublicClientApplication.builder("client_id").build();