Fixed :dd-smoke-tests:gradle module tests.

Author: AlexeyKuznetsov-DD

.gitlab-ci.yml

@@ -289,7 +289,7 @@ build_tests:
         CACHE_TYPE: "latestdep"
       - GRADLE_TARGET: ":smokeTest"
         CACHE_TYPE: "smoke"
-        MAVEN_OPTS: "-Xms64M -Xmx512M"
+        MAVEN_OPTS: "-Xms256M -Xmx1024M"
 
   script:
     - *gitlab_base_ref_params

dd-java-agent/testing/src/main/groovy/datadog/trace/agent/test/server/http/TestHttpServer.groovy

@@ -6,6 +6,7 @@ import datadog.trace.bootstrap.instrumentation.api.AgentSpanContext
 import datadog.trace.bootstrap.instrumentation.api.Tags
 import datadog.trace.core.DDSpan
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings
+import groovy.transform.CompileStatic
 import org.eclipse.jetty.http.HttpMethod
 import org.eclipse.jetty.http.HttpVersion
 import org.eclipse.jetty.server.Handler
@@ -316,6 +317,7 @@ class TestHttpServer implements AutoCloseable {
       this.prefix = prefix.startsWith("/") ? prefix : "/" + prefix
     }
 
+    @CompileStatic // Workaround to avoid `groovy.lang.MissingMethodException`.
     @Override
     void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
       if (target.startsWith(prefix)) {

dd-smoke-tests/gradle/build.gradle

@@ -6,7 +6,7 @@ apply from: "$rootDir/gradle/java.gradle"
 description = 'Gradle Daemon Instrumentation Smoke Tests.'
 
 dependencies {
-  testImplementation 'org.codehaus.groovy:groovy-all:3.0.24'
+  testImplementation 'org.codehaus.groovy:groovy:3.0.24'
   testImplementation 'org.spockframework:spock-core:2.4-M6-groovy-3.0'
   testImplementation 'org.objenesis:objenesis:3.3'
 
@@ -34,4 +34,3 @@ tasks.named("test", Test) {
     environment "MAVEN_REPOSITORY_PROXY", project.property("mavenRepositoryProxy")
   }
 }
-

settings.gradle.kts

@@ -167,7 +167,7 @@ include(
   ":dd-smoke-tests:custom-systemloader",
   ":dd-smoke-tests:dynamic-config",
   ":dd-smoke-tests:field-injection",
-  // ":dd-smoke-tests:gradle", This module needs Groovy 3.
+  ":dd-smoke-tests:gradle",
   ":dd-smoke-tests:grpc-1.5",
   ":dd-smoke-tests:java9-modules",
   ":dd-smoke-tests:jersey-2",