Extract configuration keys into constants

Make use of them in ConfigurationTest and also make use of existing
constant for default values to remove duplication.

Change-Id: I482a2269cdf81ef45c4ac8605452416e98172f5a
2 files changed
tree: beae99b1f15ffc6c1ef0900e5539bff5c58b5483
  1. lib/
  2. src/
  3. .buckconfig
  4. .gitignore
  5. .mailmap
  6. BUCK