TypeMapper fails into infinite loop for certain Type cycles in user classes

[bartoszwalacik]

repro:

package org.javers.core.cases

import org.javers.core.JaversBuilder
import org.javers.core.metamodel.annotation.Id
import org.javers.repository.jql.QueryBuilder
import spock.lang.Specification

class Employee {
    @Id
    int id
    Person person
}

class Person {
    @Id
    String name
    Employee employee
}

/**
 * @author bartosz.walacik
 */
class OrganizationStructureLoopCase extends Specification{

    def "should manage Employee to Person cycle"(){
        given:
        def person = new Person(name:"kaz")
        def emp = new Employee(id:1, person:person)
        person.employee = emp

        when:
        def javers = JaversBuilder.javers().build()
        javers.commit("a",emp)

        def snapshots = javers.findSnapshots(QueryBuilder.byInstanceId("kaz", Employee).build())

        then:
        snapshots.size() == 1
    }
}