Upgrade Mockito to 1.8 [INT-863]

**[Oleg Zhurakousky](https://jira.spring.io/secure/ViewProfile.jspa?name=oleg.zhurakousky@springsource.com)** opened **[INT-863](https://jira.spring.io/browse/INT-863?redirect=false)** and commented

Dependent on https://issuetracker.springsource.com/browse/EBR-520


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No further details from [INT-863](https://jira.spring.io/browse/INT-863?redirect=false)