### Description of problem:

Annotation must be scanned regardless of the version of web.xml unless metadata-complete is explicitly set to true.

Note that Servlet 3.0 specification clearly states the following:

~~~
1.6.2 Processing annotations
In Servlet 2.5, metadata-complete only affected the scanning of annotations at
deployment time. The notion of web-fragments did not exist in servlet 2.5. However
in servlet 3.0 metadata-complete affects scanning of all annotations and web-
fragments at deployment time. The version of the descriptor MUST not affect which
annotations you scan for in a web application. An implementation of a particular
version of the specification MUST scan for all annotations supported in that
configuration, unless metadata-complete is specified.
~~~


### How reproducible:

Anytime


### Steps to Reproduce:

1. Create a library jar which contains a servlet filter using @WebFilter 
2. Put the jar under WEB-INF/lib of the web application which web.xml version is 2.3 or 2.4
3. Start JBoss EAP 6
4. Access the web application and see if the servlet filter works


### Actual results:

The servlet filter is not invoked


### Expected results:

The servlet filter is invoked


### Additional info:

It works when the version of web.xml is 2.5 or 3.0