fix(gax): align env var and logging level

Author: westarle

gax-java/gax/src/main/java/com/google/api/gax/rpc/ClientContext.java

@@ -281,7 +281,7 @@ public static ClientContext create(StubSettings settings) throws IOException {
     if (apiTracerFactory instanceof SpanTracerFactory) {
       apiTracerFactory = apiTracerFactory.withContext(apiTracerContext);
     }
-    if (com.google.api.gax.logging.LoggingUtils.isLoggingV2Enabled()) {
+    if (com.google.api.gax.logging.LoggingUtils.isLoggingEnabled()) {
       com.google.api.gax.tracing.ApiTracerFactory loggingTracerFactory =
           new com.google.api.gax.tracing.LoggingTracerFactory().withContext(apiTracerContext);
       apiTracerFactory =

gax-java/gax/src/main/java/com/google/api/gax/tracing/LoggingTracer.java

@@ -117,7 +117,6 @@ private void recordActionableError(Throwable error) {
     }
 
     String message = error.getMessage() != null ? error.getMessage() : error.getClass().getName();
-    LoggingUtils.logActionableError(
-        logContext, LOGGER_PROVIDER, org.slf4j.event.Level.INFO, message);
+    LoggingUtils.logActionableError(logContext, LOGGER_PROVIDER, message);
   }
 }