Preparation for SHA-256 upgrade continues in the test department.
* bc/hash-independent-tests-part-5:
t4009: make hash size independent
t4002: make hash independent
t4000: make hash size independent
t3903: abstract away SHA-1-specific constants
t3800: make hash-size independent
t3600: make hash size independent
t3506: make hash independent
t3430: avoid hard-coded object IDs
t3404: abstract away SHA-1-specific constants
t3306: abstract away SHA-1-specific constants
t3305: make hash size independent
t3301: abstract away SHA-1-specific constants
t3206: abstract away hash size constants
t3201: abstract away SHA-1-specific constants