Move service-search-nls to oskari-server-extras

[jampukka]

Functionality is NLS specific

[ZakarFin]

Deployed to oskari.org/nexus. To use replace:

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

With:

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