use @CompileStatic for FormTagLib.outputAttributes since it's showing up in profiler
it looked like a similar problem as GROOVY-5428, this change should workaround that problem
Register ConversionService to applicationContext
Fix concurrency problem in FormTagLib, replace shared SimpleTypeConverter with ConversionService
Use CompileStatic in GroovyPagesMetaUtils and NamespacedTagDispatcher
handle untyped parameters in taglib's method missing registration