Play Framework

chore(build): silence ant compile warning + Mockito self-attach warnings

Two unrelated build.xml hygiene fixes bundled:

includeantruntime declared explicitly:
- Main compile: includeantruntime="true" (framework src genuinely needs
  the Ant runtime — play.ant.* tasks import org.apache.tools.ant.*).
- Test compiles: includeantruntime="false" (test code doesn't import
  Ant types directly).
Silences "'includeantruntime' was not set" warning while declaring the
real dependency surface honestly per target.

Mockito self-attach silenced:
- Add bytebuddy.agent.jar property pinned to lib-test/byte-buddy-agent-1.17.6.jar
  (bump in lock-step with byte-buddy-*.jar).
- Pass -javaagent:${bytebuddy.agent.jar} to the four test-running fork
  targets (unittest, integration-test, test-single, debug-test-single)
  so Mockito's inline mock-maker doesn't dynamically self-attach
  byte-buddy-agent at runtime.
Silences:
  - "Mockito is currently self-attaching to enable the inline-mock-maker"
  - "WARNING: A Java agent has been loaded dynamically"
  - "WARNING: Dynamic loading of agents will be disallowed by default"
NetBeans nb-* targets unchanged — they fork the application, not tests,
and don't load Mockito.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>