Created a metrics model for NFV-related information

package org.etsi.osl.model.nfv.metrics;

import com.fasterxml.jackson.annotation.JsonProperty;

public class RegisteredManoProviders {

    @JsonProperty("registeredManoProviders")

    private final int registeredManoProviders;

    public RegisteredManoProviders(int registeredManoProviders) {

        this.registeredManoProviders = registeredManoProviders;

    }

    public int getRegisteredManoProviders() {

        return registeredManoProviders;

    }

}

package org.etsi.osl.model.nfv.metrics;

import com.fasterxml.jackson.annotation.JsonProperty;

public class RegisteredNSDs {

    @JsonProperty("registeredNSDs")

    private final int registeredNSDs;

    public RegisteredNSDs(int registeredNSDs) {

        this.registeredNSDs = registeredNSDs;

    }

    public int getRegisteredNSDs() {

        return registeredNSDs;

    }

}

package org.etsi.osl.model.nfv.metrics;

import com.fasterxml.jackson.annotation.JsonProperty;

public class RegisteredVNFs {

    @JsonProperty("registeredVNFs")

    private final int registeredVNFs;

    public RegisteredVNFs(int registeredVNFs) {

        this.registeredVNFs = registeredVNFs;

    }

    public int getRegisteredVNFs() {

        return registeredVNFs;

    }

}