INT-2920 Fix two hits to MessageStore

[nickspacek]

Reduce ClaimCheckOutTransformer's hits to the MessageStore.

JIRA: https://jira.springsource.org/browse/INT-2920

[markfisher]

Thanks for issuing the pull request! One "minor" detail... it doesn't compile ;)

spring-integration/spring-integration-core/src/main/java/org/springframework/integration/transformer/ClaimCheckOutTransformer.java:70: ';' expected
                + " within MessageStore [" + this.messageStore + "]")
                                                                     ^
1 error
:spring-integration-core:compileJava FAILED

I can fix that, but it would be great if you re-issue. Also, if you don't mind updating the copyright range to 2013, and add an @ author tag.

For future reference (we do hope you issue more PRs!), the info here can be helpful for walking thru the steps (like running the build and tests pre-push, etc): https://github.com/SpringSource/spring-integration/wiki/Contributor-Guidelines

[nickspacek]

That's embarrassing, I will admit I skipped the build and test, yikes. I will make the changes!

[nickspacek]

I don't think this is related to my fix, but when I run the tests I get 1 failure:

org.springframework.integration.core.AsyncMessagingTemplateTests > executionException
FAILED
    java.lang.Exception
        Caused by: java.util.concurrent.TimeoutException at AsyncMessagingTemplateTests.java:409

[garyrussell]

LGTM; merging.