Merge branch 'bc/hash-independent-tests-part-4'

Update to the tests to help SHA-256 transition continues.

* bc/hash-independent-tests-part-4:
t2203: avoid hard-coded object ID values
t1710: make hash independent
t1007: remove SHA1 prerequisites
t0090: make test pass with SHA-256
t0027: make hash size independent
t6030: make test work with SHA-256
t5000: make hash independent
t1450: make hash size independent
t1410: make hash size independent
t: add helper to convert object IDs to paths

diff --cc t/test-lib-functions.sh
Simple merge