doc/guide/logging.xml
    Updated logging section with more explanation of maxsize and maxver

src/lib/dhcpsrv/logging_info.cc
    LoggingInfo::toSpec()
        Now sets maxsize and maxver in created spec

src/lib/dhcpsrv/tests/logging_info_unittest.cc
    TEST_F(LoggingInfoTest, defaults)
        Added checks for default maxsize and maxver

src/lib/dhcpsrv/tests/logging_unittest.cc
    LoggingTest:
        Added support for log files

    TEST_F(LoggingTest, logRotate) - new test the ensures
    logs rotate when configured to do so

src/lib/testutils/dhcp_test_lib.sh.in
    Added code to remove log lock file.  When rotation is enabled,
    lock files are automatically enabled.