NLS specific code removal

[ZakarFin]

Due to being specific to NLS Finland services the code has been moved to nlsfi/oskari-server-extras#1 and but it's still available in oskari.org/nexus. For drop-in replacement change:

     <dependency>
        <groupId>fi.nls.oskari.service</groupId>
        <artifactId>oskari-search-nls</artifactId>
        <version>${oskari.version}</version>
    </dependency>

to:

     <dependency>
        <groupId>fi.nls.oskari.extras</groupId>
        <artifactId>oskari-search-nls</artifactId>
        <version>2.0</version>
    </dependency>