validation.xml ?

Hi,

What’s the file [validation.xml](https://github.com/jcabi/jcabi-aspects/blob/master/src/main/resources/META-INF/validation.xml) for in `META-INF` in `jcabi-aspects-0.22.5.jar`?

That file makes Glassfish refuse to deploy my application (which includes jcabi-github, hence, jcabi-aspects by transitive dependency mechanisms).

Glassfish complains when deploying (in its log file), as follows (partial).
```
[2018-02-05T00:33:49.083+0100] [glassfish 4.1] [INFO] []
[org.hibernate.validator.internal.xml.ValidationXmlParser]
[tid: _ThreadID=44 _ThreadName=AutoDeployer]
[timeMillis: 1517787229083] [levelValue: 800] [[
HV000007: META-INF/validation.xml found. Parsing XML based configuration.]]

[2018-02-05T00:33:49.104+0100] [glassfish 4.1] [WARNING] []
[org.glassfish.jersey.internal.Errors]
[tid: _ThreadID=44 _ThreadName=AutoDeployer]
[timeMillis: 1517787229104] [levelValue: 900] [[
The following warnings have been detected: WARNING: Unknown HK2 failure detected:
MultiException stack 1 of 1
org.apache.xerces.impl.dv.ObjectFactory$ConfigurationError:
Provider org.apache.xerces.impl.dv.dtd.DTDDVFactoryImpl could not be instantiated:
java.lang.IllegalStateException: This web container has not yet been started
```

(I ask here rather than in jcabi-aspects because this bug hits me as a user of jcabi-github, and possible solutions might be available because of this. Sorry if it is inappopriate.)