Add unit tests for api-tools/parser/gradeLoader #44

[SoggyRhino]

Since the profiles loader is going to be changed soon 111, this is just the unit tests for the grade loader.

gradeLoader

• Changed api to return a map rather than setting the global value, this made it easier to test.
• The biggest change here was to the logging originally we created a separate log file for each csv. I changed it so we just log normally (std out and single log file).
• There was also a bug where the logging dir was hard coded to './logs/'

build.bat

• Since build.bat is in the root directory we don't need to use ./... This was causing the script to run fmt in the parent directory (ie parent/api-tools), causing it to fail since I have other go projects there that are not formatted.

parser.go

• Minor change due to the new api for load grades

parser_test.go

• Updated tests to now use grade data
• Made updater smarter so updating testcases doesn't make commits to bloated

validator_test.go

• Made index map dynamic