[SYNCOPE-359] Not generating PropagationTask instances when no mapping is provided

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_1_X@1468807 13f79535-47bb-0310-9956-ffa450edef68
Merge from 1_0_X

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_1_X@1468808 13f79535-47bb-0310-9956-ffa450edef68
Merge from 1_1_X

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