Fixed failed tests.

Author: AlexeyKuznetsov-DD

dd-java-agent/instrumentation/java/java-net/java-net-1.8/src/test/groovy/datadog/trace/instrumentation/java/net/URLEncoderCallSiteTest.groovy

@@ -5,10 +5,13 @@ import datadog.trace.api.iast.InstrumentationBridge
 import datadog.trace.api.iast.propagation.CodecModule
 import datadog.trace.api.iast.propagation.PropagationModule
 import foo.bar.TestURLEncoderCallSiteSuite
+import java.nio.charset.Charset
 
 class URLEncoderCallSiteTest extends InstrumentationSpecification {
   // Explicit escape for non-ASCII `ståle` to make test independent of container settings.
   private static final String NON_ASCII_QUERY = 'my test.asp?name=st\u00E5le&car=saab'
+  private static final String DEFAULT_CHARSET_ENCODED =
+  URLEncoder.encode(NON_ASCII_QUERY, Charset.defaultCharset().name())
 
   @Override
   protected void configurePreAgent() {
@@ -30,7 +33,7 @@ class URLEncoderCallSiteTest extends InstrumentationSpecification {
 
     where:
     args                       | expected
-    [NON_ASCII_QUERY]          | 'my+test.asp%3Fname%3Dst%C3%A5le%26car%3Dsaab'
+    [NON_ASCII_QUERY]          | DEFAULT_CHARSET_ENCODED
     [NON_ASCII_QUERY, 'UTF-8'] | 'my+test.asp%3Fname%3Dst%C3%A5le%26car%3Dsaab'
   }