improved annotation search performance

[seppl831]

adresses #844

[stleary]

@seppl831 Good catch and fix, Thanks!

[stleary]

What problem does this code solve?
Addresses a performance issue while converting POJO to JSONObject

Does the code still compile with Java6?
Yes

Risks
Low

Changes to the API?
No

Will this require a new release?
No

Should the documentation be updated?
No

Does it break the unit tests?
No

Was any code refactored in this commit?
No

Review status
APPROVED

Starting 3-day comment window