Fix #1765: Sometimes module info not exists or not loaded.

[ipfans]

Fix #1765.

@StevenACoffman but I think this maybe need some discussion. I have two ways to fix this: remove module info checks or just call packages.Load() twice. Both can solve this issue. But I prefer the this one.

I have:

• Added tests covering the bug / feature (see testing)
• Updated any relevant documentation (see docs)

[StevenACoffman]

Some failing tests:

--- FAIL: TestAutobinding (0.20s)
    --- FAIL: TestAutobinding/with_file_path (0.03s)
        config_test.go:211: 
            	Error Trace:	config_test.go:211
            	Error:      	An error is expected but got nil.
            	Test:       	TestAutobinding/with_file_path

[ipfans]

Yeah, I see. I will updated later.

[coveralls]

Coverage decreased (-0.03%) to 70.685% when pulling 7a75e2d on ipfans:master into 99be195 on 99designs:master.

[StevenACoffman]

I removed the failing test for now, but I would have preferred to instead to have replaced it, perhaps with a test for #1763
So if you are able, I would love to merge that as a separate PR, but want to unbreak people ASAP.