LDEV-4407 Tools and core to use learning classes from lams_common Tools and core start using shared learning classes that were recently moved from lams_learning to lams_common.
Remove any leftover dependencies on lams_learning.
LDEV-4363 Adding stub for old lams_tool_dimdim Adding lams_tool_dimdim to GitHub as we need to use it for other site and we didn't import it originally from CVS.