Snippet Injection add Smoke Test for reproducing Get ClassException

[siyuniu-ms]

In local test, got ClassCastException
warningjava.lang.ClassCastException: class io.opentelemetry.javaagent.instrumentation.servlet.snippet.InjectionState cannot be cast to class io.opentelemetry.javaagent.instrumentation.servlet.snippet.InjectionState (io.opentelemetry.javaagent.instrumentation.servlet.snippet.InjectionState is in unnamed module of loader org.apache.catalina.loader.ParallelWebappClassLoader @46f36c44; io.opentelemetry.javaagent.instrumentation.servlet.snippet.InjectionState is in unnamed module of loader java.net.URLClassLoader @644a3add)

Add a smoke test in OTEL to reproduce this problem.

[siyuniu-ms]

The stack trace is as follows:
2023-06-13` 00:06:34.628Z DEBUG i.o.j.e.i.InstrumentationModule - Applying instrumentation: servlet [class io.opentelemetry.javaagent.instrumentation.servlet.v3_0.Servlet3InstrumentationModule] on ParallelWebappClassLoader
context: SnippetInjection
delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@538a2f0e

2023-06-13 00:06:34.629Z DEBUG i.o.javaagent.tooling.HelperInjector - Injecting classes onto class loader ParallelWebappClassLoader
context: SnippetInjection
delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@538a2f0e
-> [io.opentelemetry.javaagent.instrumentation.servlet.v3_0.Servlet3Singletons, io.opentelemetry.javaagent.instrumentation.servlet.snippet.OutputStreamSnippetInjectionHelper, io.opentelemetry.javaagent.instrumentation.servlet.v3_0.snippet.ServletOutputStreamInjectionState, io.opentelemetry.javaagent.instrumentation.servlet.snippet.InjectionState, io.opentelemetry.javaagent.instrumentation.servlet.snippet.SnippetInjectingResponseWrapper, io.opentelemetry.javaagent.instrumentation.servlet.ServletAccessor, io.opentelemetry.javaagent.instrumentation.servlet.ServletInstrumenterBuilder, io.opentelemetry.javaagent.instrumentation.servlet.common.response.ResponseInstrumenterFactory, io.opentelemetry.javaagent.instrumentation.servlet.snippet.SnippetInjectingPrintWriter, io.opentelemetry.javaagent.instrumentation.servlet.BaseServletHelper, io.opentelemetry.javaagent.instrumentation.servlet.ServletRequestContext, io.opentelemetry.javaagent.instrumentation.servlet.ServletAsyncListener, io.opentelemetry.javaagent.instrumentation.servlet.AsyncRunnableWrapper, io.opentelemetry.javaagent.instrumentation.servlet.ServletResponseContext, io.opentelemetry.javaagent.instrumentation.servlet.ServletNetAttributesGetter, io.opentelemetry.javaagent.instrumentation.servlet.ServletAdditionalAttributesExtractor, io.opentelemetry.javaagent.instrumentation.servlet.ServletRequestGetter, io.opentelemetry.javaagent.instrumentation.servlet.ServletErrorCauseExtractor, io.opentelemetry.javaagent.instrumentation.servlet.ServletRequestParametersExtractor, io.opentelemetry.javaagent.instrumentation.servlet.ServletHttpAttributesGetter, io.opentelemetry.javaagent.instrumentation.servlet.v3_0.Servlet3Accessor$Listener, io.opentelemetry.javaagent.instrumentation.servlet.v3_0.Servlet3Accessor$1, io.opentelemetry.javaagent.instrumentation.servlet.ServletSpanNameProvider, io.opentelemetry.javaagent.instrumentation.servlet.ServletMappingResolverFactory, io.opentelemetry.javaagent.instrumentation.servlet.ServletMappingResolverFactory$Mappings, io.opentelemetry.javaagent.instrumentation.servlet.ServletMappingResolverFactory$MappingResolverHolder, io.opentelemetry.javaagent.instrumentation.servlet.common.response.HttpServletResponseAdviceHelper$StartResult, io.opentelemetry.javaagent.instrumentation.servlet.common.response.HttpServletResponseAdviceHelper, io.opentelemetry.javaagent.instrumentation.servlet.common.response.HttpServletResponseAdviceHelper$1, io.opentelemetry.javaagent.instrumentation.servlet.v3_0.snippet.Servlet3SnippetInjectingResponseWrapper, io.opentelemetry.javaagent.instrumentation.servlet.javax.JavaxServletAccessor, io.opentelemetry.javaagent.instrumentation.servlet.ServletHelper, io.opentelemetry.javaagent.instrumentation.servlet.AsyncRequestCompletionListener, io.opentelemetry.javaagent.instrumentation.servlet.ServletFilterMappingResolverFactory, io.opentelemetry.javaagent.instrumentation.servlet.v3_0.Servlet3MappingResolverFactory, io.opentelemetry.javaagent.instrumentation.servlet.v3_0.Servlet3Accessor, io.opentelemetry.javaagent.instrumentation.servlet.v3_0.Servlet3FilterMappingResolverFactory]

2023-06-13 00:06:34.659Z DEBUG i.o.j.e.i.InstrumentationModule - Applying instrumentation: spring-webmvc [class io.opentelemetry.javaagent.instrumentation.spring.webmvc.v3_1.SpringWebMvcInstrumentationModule] on ParallelWebappClassLoader