Created a metrics model for TMF-related information

package org.etsi.osl.tmf.metrics;

import com.fasterxml.jackson.annotation.JsonProperty;

public class ActiveServiceOrders {

    @JsonProperty("activeServiceOrders")

    private final int activeServiceOrders;

    public ActiveServiceOrders(int activeServiceOrders) {

        this.activeServiceOrders = activeServiceOrders;

    }

    public int getActiveServiceOrders() {

        return activeServiceOrders;

    }

}

package org.etsi.osl.tmf.metrics;

import com.fasterxml.jackson.annotation.JsonProperty;

import java.util.List;

public class GroupByDayAggregations {

    @JsonProperty("groupByDay")

    private final List<GroupByItem> groupByDay;

    public GroupByDayAggregations(List<GroupByItem> groupByDay) {

        this.groupByDay = groupByDay;

    }

    public List<GroupByItem> getGroupByDay() {

        return groupByDay;

    }

}

package org.etsi.osl.tmf.metrics;

import com.fasterxml.jackson.annotation.JsonProperty;

public class GroupByItem {

    @JsonProperty("key")

    private final String key;

    @JsonProperty("count")

    private final int count;

    public GroupByItem(String key, int count) {

        this.key = key;

        this.count = count;

    }

    public String getKey() {

        return key;

    }

    public int getCount() {

        return count;

    }

}

package org.etsi.osl.tmf.metrics;

import com.fasterxml.jackson.annotation.JsonProperty;

import java.util.List;

public class GroupByStateAggregations {

    @JsonProperty("groupByState")

    private final List<GroupByItem> groupByState;

    public GroupByStateAggregations(List<GroupByItem> groupByState) {

        this.groupByState = groupByState;

    }

    public List<GroupByItem> getGroupByState() {

        return groupByState;

    }

}

package org.etsi.osl.tmf.metrics;

import com.fasterxml.jackson.annotation.JsonProperty;

public class PublishedServiceSpecifications {

    @JsonProperty("publishedServiceSpecifications")

    private final int publishedServiceSpecifications;

    public PublishedServiceSpecifications(int publishedServiceSpecifications) {

        this.publishedServiceSpecifications = publishedServiceSpecifications;

    }

    public int getPublishedServiceSpecifications() {

        return publishedServiceSpecifications;

    }

}