Increment Java Cloud Debugger version to 2.16

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174711041

Increment minor version to 2.15 to prepare for a new release.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=159890586

Increment minor version to 2.14 to prepare for a new release.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=156319538

Increment minor version to 2.13 to prepare for a new release.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=155003222

Increment minor version to 2.12 to prepare for a new release.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=153211686

Increment minor version to 2.11 to prepare for a new release.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=152195289

Fix makefile: use ifneq instead of ifndef

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=151622898

Increment minor version to 2.9 to prepare for a new release.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=148830554

Increment minor version of Java Cloud Debugger

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=111559500

Update Java Cloud Debugger to v2.2