first commit
add arquillian test.
Merge branch 'arquillian'

Conflicts:
	.gitignore
	build.gradle
	src/main/java/sample/dao/impl/UserDaoImpl.java
	src/main/resources/META-INF/persistence.xml
	src/main/webapp/WEB-INF/beans.xml
	src/test/groovy/sample/domain/user/UserSpec.groovy