Fix mixing loading from file or all files in a dir #312

Job	Run time
Event File	5s
Build Erlang/OTP (64-bit)	52m 16s
Build Erlang/OTP (macOS)	15m 30s
Build Erlang/OTP (Windows)	26m 48s
Build Erlang/OTP (32-bit)	13m 10s
Build Erlang/OTP (Types and Flavors)	11m 44s
Build Erlang/OTP (cross-compile)	20m 24s
Build Erlang/OTP (iOS)	7m 24s
Build and check documentation	13m 3s
Build Erlang/OTP (clang)	7m 40s
Run static analysis	11m 57s
Test Erlang/OTP (emulator)	49m 18s
Test Erlang/OTP (debug)	6m 58s
Test Erlang/OTP (asn1)	21m 36s
Test Erlang/OTP (common_test)	1h 30m 50s
Test Erlang/OTP (compiler)	16m 4s
Test Erlang/OTP (crypto)	6m 23s
Test Erlang/OTP (debugger)	5m 7s
Test Erlang/OTP (dialyzer)	31m 41s
Test Erlang/OTP (edoc)	4m 57s
Test Erlang/OTP (eldap)	4m 16s
Test Erlang/OTP (erl_docgen)	4m 51s
Test Erlang/OTP (erl_interface)	6m 46s
Test Erlang/OTP (eunit)	4m 43s
Test Erlang/OTP (inets)	11m 33s
Test Erlang/OTP (kernel)	1h 3m 44s
Test Erlang/OTP (megaco)	32m 59s
Test Erlang/OTP (mnesia)	20m 36s
Test Erlang/OTP (observer)	14m 45s
Test Erlang/OTP (os_mon)	5m 9s
Test Erlang/OTP (public_key)	5m 53s
Test Erlang/OTP (reltool)	8m 54s
Test Erlang/OTP (runtime_tools)	5m 52s
Test Erlang/OTP (sasl)	10m 24s
Test Erlang/OTP (snmp)	49m 52s
Test Erlang/OTP (ssh)	58m 6s
Test Erlang/OTP (ssl)	49m 37s
Test Erlang/OTP (stdlib)	39m 44s
Test Erlang/OTP (tftp)	6m 51s
Test Erlang/OTP (tools)	7m 53s
Test Erlang/OTP (wx)	4m 39s
Test Erlang/OTP (xmerl)	8m 39s
Release Erlang/OTP	0s
Test Erlang/OTP (system)	16m 56s
	14h 15m 37s

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