Handle large json failures

[ryanbrandenburg]

The output files for particularly large or complex repositories can be quite large which can lead to errors like this one:

Error: Cannot create a string longer than 0x1fffffe8 characters
    at Buffer.toString (node:buffer:830:17)
    at JSON.parse (<anonymous>)
    at ScanCodeProcessor._hasRealErrors (/opt/service/providers/process/scancode.js:94:26)

But we don't want that error to obscure the underlying exceptions, so I suggest that we first always log, and then add an extra level of try-catch in _hasRealErrors.

[pombredanne]

Thanks. Merging!

[jamesiri]

@pombredanne the merge is blocked by a scancode error

[JamieMagee]

The tests were failing because the new this.logger.error() calls didn't have a matching method in the test mocks. Added error to both logger mocks in scancodeTests.js. Also ran prettier on scancode.js to fix a missing space after try.