CS-5224: Allow custom memory_limit for internal composer and plugin related system calls
Merge remote-tracking branch 'upstream/v4.3' into CS-5524_v4.3

Conflicts:
	newscoop/application/configs/parameters/parameters.yml
CS-5524: Fixed code typo
Merge pull request #839 from m038/CS-5524_v4.3

WIP: CS-5224: Allow custom memory_limit for composer