Allow to receive Audit messages

[ohr]

Provide ability to receive syslog audit messages (TLS, UDP) and to parse them

[ohr]

Added TLS and UDP SyslogServer implementations to ipf-commons-audit module.

Must include the following dependencies to work with the servers:

        <dependency>
            <groupId>io.projectreactor.netty</groupId>
            <artifactId>reactor-netty</artifactId>
        </dependency>
        <dependency>
            <groupId>com.github.palindromicity</groupId>
            <artifactId>simple-syslog-5424</artifactId>
        </dependency>

Also, DICOMAuditParser allows to parse (and optionally validate) XML-formatted ATNA message that was written with the DICOM2017c (default) SerializationStrategy.