Pin wiremock-jre8-standalone to 2.33.+ for 1.8.x and 1.9.x

This is a backport of a8709ab
fixes gh-3468
related gh-3414

dependencies.gradle

@@ -6,7 +6,8 @@ def VERSIONS = [
         'com.fasterxml.jackson.core:jackson-databind:latest.release',
         'com.github.ben-manes.caffeine:caffeine:2.+',
         'com.github.charithe:kafka-junit:latest.release',
-        'com.github.tomakehurst:wiremock-jre8-standalone:latest.release',
+        // pinned to avoid issues with shaded slf4j version - see gh-3414
+        'com.github.tomakehurst:wiremock-jre8-standalone:2.33.+',
         'com.google.cloud:google-cloud-monitoring:3.1.+',
         'com.google.dagger:dagger:2.11',
         'com.google.dagger:dagger-compiler:2.11',