Correct tests when running under rake w/ jruby directly

Co-authored-by: Joni Lahtinen <[email protected]>

Author: chadlwilson

src/spec/ruby/rack/servlet/response_capture_spec.rb

@@ -103,11 +103,4 @@
     expect( response_capture.isHandled ).to be true
     expect( response_capture.getStatus ).to eql 200
   end
-
-  private
-
-  def servlet_30?
-    Java::JavaClass.for_name('javax.servlet.AsyncContext') rescue nil
-  end
-
 end

src/spec/ruby/spec_helper.rb

@@ -61,7 +61,7 @@ def silence_warnings(&block)
 
   def servlet_30?
     return @@servlet_30 unless @@servlet_30.nil?
-    @@servlet_30 = !! ( Java::JavaClass.for_name('javax.servlet.AsyncContext') rescue nil )
+    @@servlet_30 = !! ( Java::javax.servlet.AsyncContext rescue nil )
   end
   private :servlet_30?
 
@@ -199,7 +199,6 @@ def should_not_eval_as_nil(code, runtime = @runtime) # alias
     /bin\//,
     #/gems/,
     /spec\/spec_helper\.rb/,
-    /lib\/rspec\/(core|expectations|matchers|mocks)/
   ]
 
 end