Test failures on jacoco-maven-plugin with Maven 2.2.1

it-check-passes, it-check-fails-no-halt, it-check-fails-halt:
```
[INFO] Failed to configure plugin parameters for: org.jacoco:jacoco-maven-plugin:0.6.4-SNAPSHOT
Cause: Error loading class 'org.jacoco.maven.Rule'
```
it-merge-passes-merge:
```
[INFO] Failed to configure plugin parameters for: org.jacoco:jacoco-maven-plugin:0.6.4-SNAPSHOT
Cause: Class 'java.util.List' cannot be instantiated
```