SUITEDEV-2114: add composer.json and .gitignore
SUITEDEV-2114: add test infrastructure files
SUITEDEV-2114: signed header spike
SUITEDEV-1868: aws signed header spike
SUITEDEV-1868: aws signed header spike
SUITEDEV-1868: extract hash algorithm
SUITEDEV-1868: extract hash algorithm
SUITEDEV-1868: extract hash algorithm
SUITEDEV-1868: rename variable
SUITEDEV-1868: introduce final signRequest() method
SUITEDEV-1868: aws secret key prefix removed
SUITEDEV-1868: start extracting credentials
SUITEDEV-1868: extracting credentials
SUITEDEV-1868: extracting credentials
SUITEDEV-1868: extracting credentials
SUITEDEV-1868: extracting credentials
SUITEDEV-1868: create authorization header
SUITEDEV-1868: add date to headers
SUITEDEV-1868: signed headers
SUITEDEV-1868: signature validation comments