Revert "Temporary fix for Spring snapshot changes"

This reverts commit 8a804f61852100f82aa044c21f0ce6cf2d24bf8c.
Extend PropertiesLauncher to load nested archives

PropertiesLauncher can now be used to run an executable jar, and by
default it will pick up nested archives in lib/ (where the Boot
tools puts them). User can provide loader.path (colon-separated)
to change the nested path.

[#58837492] [bs-330] Add tooling for PropertiesLauncher