Adapt to updated Java version in tests

Change-Id: I1dc7788d2b17b5bbc39c786e64e6ff7f5ecbc201

tests/container-images/gerrit-base/test_container_structure_gerrit_base.py

diff --git a/tests/container-images/gerrit-base/test_container_structure_gerrit_base.py b/tests/container-images/gerrit-base/test_container_structure_gerrit_base.py
index b726f0a..6ab63ca 100755
--- a/tests/container-images/gerrit-base/test_container_structure_gerrit_base.py
+++ b/tests/container-images/gerrit-base/test_container_structure_gerrit_base.py
@@ -19,7 +19,7 @@
 import utils
 
 
-JAVA_VER = 21
+JAVA_VER = 25
 
 
 @pytest.fixture(scope="module")