Fix Detekt issues

Author: jkmassel

libs/fluxc/src/main/java/org/wordpress/android/fluxc/network/rest/wpapi/WPcomLoginClient.kt

@@ -63,7 +63,7 @@ class WPcomLoginClient @Inject constructor(
             } else {
                 val json = response.body?.string() ?: return@withContext Result.failure(WPcomLoginError.InvalidResponse)
                 val gson = Gson().fromJson(json, WPcomAuthorizationCodeResponse::class.java)
-                Result.success(gson.access_token)
+                Result.success(gson.accessToken)
             }
         }
     }

libs/fluxc/src/main/java/org/wordpress/android/fluxc/network/rest/wpapi/applicationpasswords/WPcomAuthorizationCodeResponse.kt

@@ -1,9 +1,11 @@
 package org.wordpress.android.fluxc.network.rest.wpapi.applicationpasswords
 
+import com.google.gson.annotations.SerializedName
+
 data class WPcomAuthorizationCodeResponse(
-    val access_token: String,
-    val token_type: String,
-    val blog_id: String,
-    val blog_url: String,
+    @SerializedName("access_token") val accessToken: String,
+    @SerializedName("token_type") val tokenType: String,
+    @SerializedName("blog_id") val blogId: String,
+    @SerializedName("blog_url") val blogUrl: String,
     val scope: String
 )