Downgrade RCPTT framework version for the Eclipse Dev environment to the 2.4.1 release.
Downgrade RCPTT framework version for the Eclipse Dev environment
to the 2.4.1 release.

I couldn't figure out with what 2.4.2 is compatible, but it surely
isn't anything we use.

[Tests][RCPTT][IDE]

lemmy/tlaplus,tlaplus/tlaplus,lemmy/tlaplus,lemmy/tlaplus,tlaplus/tlaplus,tlaplus/tlaplus,tlaplus/tlaplus,lemmy/tlaplus