Mgmt: fix lower case error and typo (Azure#18490)

Author: ChenTanyi

sdk/resourcemanager/azure-resourcemanager-authorization/src/main/java/com/azure/resourcemanager/authorization/implementation/ActiveDirectoryGroupImpl.java

@@ -92,7 +92,7 @@ private ActiveDirectoryObject parseDirectoryObject(MicrosoftGraphDirectoryObject
                             jsonString, MicrosoftGraphGroupInner.class, SerializerEncoding.JSON);
                         return new ActiveDirectoryGroupImpl(groupInner, manager());
 
-                    } else if (odataType.endsWith("#microsoft.graph.servicePrincipal")) {
+                    } else if (odataType.endsWith("#microsoft.graph.serviceprincipal")) {
                         MicrosoftGraphServicePrincipalInner servicePrincipalInner = serializerAdapter.deserialize(
                             jsonString, MicrosoftGraphServicePrincipalInner.class, SerializerEncoding.JSON);
                         return new ServicePrincipalImpl(servicePrincipalInner, manager());

sdk/resourcemanager/azure-resourcemanager-authorization/src/main/java/com/azure/resourcemanager/authorization/implementation/ServicePrincipalImpl.java

@@ -219,8 +219,8 @@ void refreshCredentials(MicrosoftGraphServicePrincipalInner inner) {
         cachedPasswordCredentials.clear();
 
         if (inner.keyCredentials() != null) {
-            inner.keyCredentials().forEach(keycredentialInner -> {
-                CertificateCredential certificateCredential = new CertificateCredentialImpl<>(keycredentialInner);
+            inner.keyCredentials().forEach(keyCredentialInner -> {
+                CertificateCredential certificateCredential = new CertificateCredentialImpl<>(keyCredentialInner);
                 cachedCertificateCredentials.put(certificateCredential.name(), certificateCredential);
             });
         }