Upgrade jclouds to 1.8.1 from 1.8.0
Upgrade testng+surefire+mockito

- testng to 6.8.8 from 6.8
- surefire to 2.18 from 2.17
- mockito to 1.10.8 from 1.9.5
- use org.testng.Assert instead of org.junit.Assert
Delete greenhousedata jclouds tests

- Greenhouse-element-vcloud was deleted in jclouds 1.8.1,
  see JCLOUDS-743
- The test included the comment “FIXME get Greenhouse working”!
Upgrade groovy to 2.3.4 from 1.8.6

- And groovy-eclipse-compiler to 2.9.0-01 from 2.7.0-01
- And groovy-eclipse-batch to 2.3.4-01 from 1.8.6-01
Add attribute for storing properties reload listener
Couchbase changes for Clocker
This closes #321

* github/pr/321:
  Delete greenhousedata jclouds tests
  Upgrade testng+surefire+mockito
  Upgrade jclouds to 1.8.1 from 1.8.0
This closes #319

* github/pr/319:
  Upgrade groovy to 2.3.4 from 1.8.6
This closes #317

* github/pr/317:
  Couchbase changes for Clocker