[TASK] Remove shut-up operator in ClassLoader
[TASK] Remove shut-up operator in ClassLoader

The last classloader change added the shut-up operator to a number of
include() calls. This change removes it again and uses file_exists()
instead.

Since those checks happen only once (when initializing the class
loader), the performance impact should be minimal.

Change-Id: If583d804e2433cd4abf558483569365ac18ca1fc
Releases: master
Original-Commit-Hash: 15f558637298aa704decfe1b4aaebf5d0770b4aa

neos/flow-development-collection,dfeyer/flow-development-collection,gerhard-boden/flow-development-collection,kdambekalns/flow-development-collection,dlubitz/flow-development-collection,mkeitsch/flow-development-collection,fcool/flow-development-collection,aertmann/flow-development-collection,robertlemke/flow-development-collection,gerhard-boden/flow-development-collection,dlubitz/flow-development-collection,dfeyer/flow-development-collection,neos/flow-development-collection,kdambekalns/flow-development-collection,dfeyer/flow-development-collection,dlubitz/flow-development-collection,albe/flow-development-collection,bwaidelich/flow-development-collection,neos/flow-development-collection,aertmann/flow-development-collection,daniellienert/flow-development-collection,robertlemke/flow-development-collection,daniellienert/flow-development-collection,albe/flow-development-collection,mkeitsch/flow-development-collection,robertlemke/flow-development-collection,chewbakartik/flow-development-collection,bwaidelich/flow-development-collection,chewbakartik/flow-development-collection,kitsunet/flow-development-collection,kdambekalns/flow-development-collection,fcool/flow-development-collection,fcool/flow-development-collection,bwaidelich/flow-development-collection,daniellienert/flow-development-collection,fcool/flow-development-collection,dfeyer/flow-development-collection,kdambekalns/flow-development-collection,neos/flow-development-collection,albe/flow-development-collection,chewbakartik/flow-development-collection,kitsunet/flow-development-collection,robertlemke/flow-development-collection,mkeitsch/flow-development-collection,gerhard-boden/flow-development-collection,aertmann/flow-development-collection,kitsunet/flow-development-collection