Upgrade dropwizard metrics-core to 3.2.5

Change-Id: I8d26232a9fe83bdcd19d11be23db579044b1735b
diff --git a/WORKSPACE b/WORKSPACE
index fe0ca1d..2857854 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -595,8 +595,8 @@
 
 maven_jar(
     name = "dropwizard_core",
-    artifact = "io.dropwizard.metrics:metrics-core:3.2.4",
-    sha1 = "36af4975e38bb39686a63ba5139dce8d3f410669",
+    artifact = "io.dropwizard.metrics:metrics-core:3.2.5",
+    sha1 = "ea2316646e9787c5b2d14ca97f4ef7ad5c6b94e9",
 )
 
 # When updading Bouncy Castle, also update it in bazlets.