Revert "Make the Rakefile properly parallelizable."
Revert "Make the Rakefile properly parallelizable."

This reverts commit 83761fab5280a4256af640368fe77535c4abb7a9.

Still doesn't work properly. :(

clemensg/passenger,gravitystorm/passenger,cgvarela/passenger,kewaunited/passenger,antek-drzewiecki/passenger,gravitystorm/passenger,jawj/passenger,pkmiec/passenger,phusion/passenger,fabiokung/passenger-debian,fabiokung/passenger-debian,jawj/passenger,jawj/passenger,jawj/passenger,clemensg/passenger,cgvarela/passenger,openSUSE/passenger,kewaunited/passenger,pkmiec/passenger,jawj/passenger,kewaunited/passenger,kewaunited/passenger,openSUSE/passenger,cgvarela/passenger,cgvarela/passenger,erikogan/passenger,kewaunited/passenger,openSUSE/passenger,openSUSE/passenger,fabiokung/passenger-debian,cgvarela/passenger,antek-drzewiecki/passenger,fabiokung/passenger-debian,pkmiec/passenger,bf4/passenger,phusion/passenger,clemensg/passenger,gravitystorm/passenger,jawj/passenger,kewaunited/passenger,erikogan/passenger,antek-drzewiecki/passenger,bf4/passenger,pkmiec/passenger,antek-drzewiecki/passenger,cgvarela/passenger,antek-drzewiecki/passenger,phusion/passenger,bf4/passenger,phusion/passenger,clemensg/passenger,gravitystorm/passenger,cgvarela/passenger,cgvarela/passenger,pkmiec/passenger,clemensg/passenger,clemensg/passenger,openSUSE/passenger,erikogan/passenger,erikogan/passenger,antek-drzewiecki/passenger,fabiokung/passenger-debian,erikogan/passenger,kewaunited/passenger,clemensg/passenger,gravitystorm/passenger,phusion/passenger,bf4/passenger,erikogan/passenger,phusion/passenger,clemensg/passenger,antek-drzewiecki/passenger,kewaunited/passenger,phusion/passenger,antek-drzewiecki/passenger,jawj/passenger,pkmiec/passenger,openSUSE/passenger,fabiokung/passenger-debian,bf4/passenger,gravitystorm/passenger,bf4/passenger,pkmiec/passenger,phusion/passenger,bf4/passenger