Minor optimization when calling class tranformers. The code was previously moved from another place but can now be optimized. Backport of r1823492 and r1823495 from trunk resp. r1823497 from tc8.5.x
tomcat/tc8.0.x/trunk/
tomcat/tc8.0.x/trunk/java/org/apache/catalina/loader/WebappClassLoaderBase.java