kiji-schema: EXP-420. Update to scala 2.10

issue: https://jira.kiji.org/browse/EXP-420
review: https://review.kiji.org/r/1706
commit: https://github.com/kijiproject/kiji-schema/commit/d13b602f0b8fd60a8f50ca60e0d406082ba19622
kiji-rest: EXP-420. Update to scala 2.10

issue: https://jira.kiji.org/browse/EXP-420
review: https://review.kiji.org/r/1705
commit: https://github.com/kijiproject/kiji-rest/commit/1e1340984c5a45097133bac39f6b0a5425f9478b