Thomas Markwalder authored Mar 17, 2022 and Razvan Becheriu committed Mar 18, 2022

src/hooks/dhcp/mysql_cb/mysql_cb_dhcp4.cc
    MySqlConfigBackendDHCPv4Impl::createUpdateClientClass4()
    - use createBinding() to conditionally create bindings
    for valid lifetime triplet

src/hooks/dhcp/mysql_cb/mysql_cb_dhcp6.cc
    MySqlConfigBackendDHCPv6Impl::createUpdateClientClass6()
    - use createBinding() to conditionally create bindings
    for valid lifetime and preferred lifetime triplets

src/lib/dhcpsrv/testutils/generic_cb_dhcp4_unittest.cc
    GenericConfigBackendDHCPv4Test::initTestClientClasses()
    - set class option defs to empty def collection to match the way
    we actually create them

    GenericConfigBackendDHCPv4Test::setAndGetAllClientClasses4Test()
    - test now compares fetched class content to source class content

src/lib/dhcpsrv/testutils/generic_cb_dhcp6_unittest.cc
    GenericConfigBackendDHCPv6Test::SetUp() - set CfgMgr family

    GenericConfigBackendDHCPv6Test::initTestClientClasses()
    - set class option defs to empty def collection to match the way
    we actually create them, also set preferred lifetime triplet

    GenericConfigBackendDHCPv6Test::setAndGetAllClientClasses4Test()
    - test now compares fetched class content to source class content