Update test scripts with new spctl usage

Fix infinite waiting in select statement

Update error message for unsupported resource tagging

Update README.md

Refine build messages for clarity

Add Simple Guide link to Swagger Abstraction

Add swagger API descriptions for Price Metadata APIs

Change the default log level to 'error'

Chaned go.sum

Merge pull request #1222 from MZC-CSC/master

[AWS] Resolve Issue : Remove Print Statements and Check Log Level #1207