POM-9. Upgrade to Avro 1.7.5

issue: https://jira.kiji.org/browse/POM-9
review: https://review.kiji.org/r/1014
DDLSHELL-49. Update kiji-schema dependency from 1.2.1-SNAPSHOT to 1.2.2-SNAPSHOT

issue: https://jira.kiji.org/browse/DDLSHELL-49
review: https://review.kiji.org/r/1044
DDLSHELL-50. Propagate changes from SCHEMA-523.

issue: https://jira.kiji.org/browse/DDLSHELL-50
review: https://review.kiji.org/r/1047
SCHEMA-551. Bump kiji-schema version to 1.3.0-SNAPSHOT

issue: https://jira.kiji.org/browse/SCHEMA-551
review: https://review.kiji.org/r/1072
POM-22. Release root pom version 1.1.3

issue: https://jira.kiji.org/browse/POM-22
review: https://review.kiji.org/r/1097
DDLSHELL-51. Add a security module.

Reviewed by: aaron