[GEARPUMP-241] Update CHANGELOG.md to reflect all JIRA's
[GEARPUMP-241] Update CHANGELOG.md to reflect all JIRA's

Author: Kam Kasravi <kamkasravi@yahoo.com>

Closes #114 from kkasravi/GEARPUMP-241.

manuzhang/incubator-gearpump,manuzhang/incubator-gearpump,manuzhang/incubator-gearpump,manuzhang/incubator-gearpump,manuzhang/incubator-gearpump