Disable optimizer in the integration test.
Disable optimizer in the integration test.

- Before this CL, optimizer is still enabled for Java backends (except jbcsrc precompiled mode since it does not use SoyFileSetHelper).
- Add a TODO to see if we should make all backends consistent on logical operators.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=156805453

google/closure-templates,Medium/closure-templates,google/closure-templates,yext/closure-templates,yext/closure-templates,Medium/closure-templates,yext/closure-templates,yext/closure-templates,google/closure-templates,Medium/closure-templates,google/closure-templates,Medium/closure-templates,Medium/closure-templates,google/closure-templates