chore: Use GCA retry settings code suggestion

Author: lqiu96

google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/testing/RemoteBigQueryHelper.java

@@ -146,22 +146,22 @@ public static RemoteBigQueryHelper create(BigQueryOptions.Builder bigqueryOption
   // Opt to keep these settings a small as possible to minimize the total test time.
   // These values can be adjusted per test case, but these serve as default values.
   private static RetrySettings retrySettings() {
-    double multiplier = 1.5;
+    double backoffMultiplier = 1.5;
     int maxAttempts = 10;
     long initialRetryDelayMs = 100L; // 0.1s initial retry delay
     long maxRetryDelayMs = 1000L; // 1s max retry delay between retry
     long initialRpcTimeoutMs = 1000L; // 1s initial rpc duration
     long maxRpcTimeoutMs = 2000L; // 2s max rpc duration
-    long totalTimeOut = 3000L; // 3s total timeout
+    long totalTimeoutMs = 3000L; // 3s total timeout
     return RetrySettings.newBuilder()
         .setMaxAttempts(maxAttempts)
-        .setTotalTimeoutDuration(Duration.ofMillis(totalTimeOut))
+        .setTotalTimeoutDuration(Duration.ofMillis(totalTimeoutMs))
         .setInitialRetryDelayDuration(Duration.ofMillis(initialRetryDelayMs))
         .setMaxRetryDelayDuration(Duration.ofMillis(maxRetryDelayMs))
-        .setRetryDelayMultiplier(multiplier)
+        .setRetryDelayMultiplier(backoffMultiplier)
         .setInitialRpcTimeoutDuration(Duration.ofMillis(initialRpcTimeoutMs))
         .setMaxRpcTimeoutDuration(Duration.ofMillis(maxRpcTimeoutMs))
-        .setRpcTimeoutMultiplier(multiplier)
+        .setRpcTimeoutMultiplier(backoffMultiplier)
         .build();
   }