Changes

Summary

1. tsk[103] adds send, accept, cancel, reject friendrequest (details)
2. tsk103 update UserEJBTest for send, accept, cancel, reject friendrequest (details)
3. tsk103 add friendship's datasets in case of acceptance (details)
4. tsk103 adds friendship's datasets in case of cancel (details)
5. tsk103 adds friendship's datasets in case of reject (details)
6. tsk103 adds friendship's datasets in case of pending (details)

Commit a224b3533811d216e89b1791b5ed38f5b8e122f7 by redouane tsk[103] adds send, accept, cancel, reject friendrequest
	service/src/main/java/es/uvigo/esei/dgss/letta/service/UserEJB.java (diff)
Commit e3d5057c0c71c6aa9c654b1dd87c8af0cf64685c by redouane tsk103 update UserEJBTest for send, accept, cancel, reject friendrequest
	service/src/test/java/es/uvigo/esei/dgss/letta/service/UserEJBTest.java (diff)
Commit cec3c47851bdb14dae20ec4bf40c7ef407ecde96 by redouane tsk103 add friendship's datasets in case of acceptance
	tests/src/main/resources/datasets/friendship-accept-user.xml (diff)
Commit 9d1af2bdeebfcae90cd25df20561b08f6a73c8b7 by redouane tsk103 adds friendship's datasets in case of cancel
	tests/src/main/resources/datasets/friendship-cancel-user.xml (diff)
Commit bcd25d0538001c1b20d4cd4a532f1c310eb19a77 by redouane tsk103 adds friendship's datasets in case of reject
	tests/src/main/resources/datasets/friendship-reject-user.xml (diff)
Commit 3fa525efcc6aaeb9a73a97aaf58ea7ff711205f6 by redouane tsk103 adds friendship's datasets in case of pending
	tests/src/main/resources/datasets/friendship-send-user.xml (diff)