feat: consider empty parameters as null

Author: daniel-mohedano

internal-api/src/main/java/datadog/trace/api/civisibility/config/TestIdentifier.java

@@ -1,6 +1,7 @@
 package datadog.trace.api.civisibility.config;
 
 import datadog.trace.util.HashingUtils;
+import datadog.trace.util.Strings;
 import java.util.Objects;
 import javax.annotation.Nullable;
 
@@ -17,12 +18,12 @@ public class TestIdentifier {
 
   public TestIdentifier(String suite, String name, @Nullable String parameters) {
     this.fqn = new TestFQN(suite, name);
-    this.parameters = parameters;
+    this.parameters = Strings.isNotBlank(parameters) ? parameters : null;
   }
 
   public TestIdentifier(TestFQN testFQN, @Nullable String parameters) {
     this.fqn = testFQN;
-    this.parameters = parameters;
+    this.parameters = Strings.isNotBlank(parameters) ? parameters : null;
   }
 
   public String getSuite() {