fix: clear resolver jar entries cache after unpacking stubs jars

Fixes #2164

Author: fstaudt

spring-cloud-contract-stub-runner/src/main/java/org/springframework/cloud/contract/stubrunner/ResourceResolvingStubDownloader.java

@@ -191,6 +191,7 @@ List<Resource> resolveResources(List<String> paths) {
 				throw new IllegalStateException(e);
 			}
 		}
+		resolver.clearCache();
 		return resources;
 	}