Error Prone: 2.2.0 -> 2.3.1

This commit contains several other changes as part of the upgrade:

- Use -XepAllDisabledChecksAsWarnings to enable all available warnings so
  that we don't need to enable each warning explicitly.

- Remove explicit suppression of warnings in generated code, since
  -XepDisableWarningsInGeneratedCode is now sufficient to suppress all warnings
  in AutoValue and Protocol Buffer generated classes.

- Remove a suppression of "ConstructorLeaksThis", since
  https://github.com/google/error-prone/pull/789 was fixed.

- Fix a few occurrences of "FieldCanBeFinal".

1 files changed, 2 insertions, 1 deletions

diff --git a/exporters/trace/jaeger/src/test/java/io/opencensus/exporter/trace/jaeger/JaegerExporterHandlerIntegrationTest.java b/exporters/trace/jaeger/src/test/java/io/opencensus/exporter/trace/jaeger/JaegerExporterHandlerIntegrationTest.java
index 9d492aa5..9d6a7976 100644
--- a/exporters/trace/jaeger/src/test/java/io/opencensus/exporter/trace/jaeger/JaegerExporterHandlerIntegrationTest.java
+++ b/exporters/trace/jaeger/src/test/java/io/opencensus/exporter/trace/jaeger/JaegerExporterHandlerIntegrationTest.java
@@ -63,7 +63,8 @@ public class JaegerExporterHandlerIntegrationTest {
   private static final Logger logger =
       LoggerFactory.getLogger(JaegerExporterHandlerIntegrationTest.class);
 
-  private HttpRequestFactory httpRequestFactory = new NetHttpTransport().createRequestFactory();
+  private final HttpRequestFactory httpRequestFactory =
+      new NetHttpTransport().createRequestFactory();
 
   private static GenericContainer<?> container;