Defining multiple classes inside an easyblock file

[Crivella]

As of know, defining multiple classes inside an easyblock file will cause eb --list-easyblocks and its associated unittest to fail (see easybuilders/easybuild-easyblocks#3338 for example)

Considering all formal easyblocks class names are supposed to start with EB_ i was wondering if it could make sense to change the regex at

easybuild-framework/easybuild/framework/easyconfig/tools.py

Line 753 in ae29588

class_regex = re.compile(r"^class ([^(]*)\(", re.M)

to search only for classes starting with EB_.