[SYNCOPE-376] Changing RestTemplate's spring scope to 'prototype'

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_1_X@1487837 13f79535-47bb-0310-9956-ffa450edef68
[SYNCOPE-376] Merge from 1_1_X

git-svn-id: https://svn.apache.org/repos/asf/syncope/trunk@1487838 13f79535-47bb-0310-9956-ffa450edef68