Shared: Fix bad join in content flow.

[michaelnebel]

17950      ~0%     {7} r1 = JOIN `_CaptureModels::PropagateContentFlow::nodeReaches/6#a1f43490#prev_delta_DataFlowImpl::Impl<CaptureMo__#shared` WITH `CaptureModels::PropagateContentFlow::readStep/5#34c0c273#cpe#25` ON FIRST 1 OUTPUT Lhs.4, Lhs.1 'source', Lhs.2 'scReads', Lhs.3 'scStores', Lhs.5 'reads', Lhs.6 'stores', Rhs.1
17950      ~1%     {8}    | JOIN WITH `DataFlowImpl::Impl<CaptureModels::PropagateContentFlow::Flow::C>::S6::PathNode.getNode/0#dispred#c4a4b697` ON FIRST 1 OUTPUT Lhs.6, Lhs.1 'source', Lhs.2 'scReads', Lhs.3 'scStores', Lhs.0, Lhs.4 'reads', Lhs.5 'stores', Rhs.1
1149877000 ~0%     {8}    | JOIN WITH `DataFlowImpl::Impl<CaptureModels::PropagateContentFlow::Flow::C>::S6::PathNode.getState/0#dispred#06e3fe70_10#join_rhs` ON FIRST 1 OUTPUT Lhs.4, Rhs.1 'node', Lhs.1 'source', Lhs.2 'scReads', Lhs.3 'scStores', Lhs.5 'reads', Lhs.6 'stores', Lhs.7
6088       ~2%     {7}    | JOIN WITH `DataFlowImpl::Impl<CaptureModels::PropagateContentFlow::Flow::C>::S6::PathNode.getASuccessor/0#dispred#3b7dd794` ON FIRST 2 OUTPUT Lhs.1 'node', Lhs.2 'source', Lhs.3 'scReads', Lhs.4 'scStores', Lhs.5 'reads', Lhs.6 'stores', Lhs.7
6088       ~2%     {8}    | JOIN WITH `DataFlowImpl::Impl<CaptureModels::PropagateContentFlow::Flow::C>::S6::PathNode.getNode/0#dispred#c4a4b697` ON FIRST 1 OUTPUT Lhs.6, Rhs.1, Lhs.1 'source', Lhs.2 'scReads', Lhs.3 'scStores', Lhs.4 'reads', Lhs.5 'stores', Lhs.0 'node'
4704       ~0%     {7}    | JOIN WITH `CaptureModels::PropagateContentFlow::readStep/5#34c0c273#cpe#134_021#join_rhs` ON FIRST 2 OUTPUT Rhs.2 'c', Lhs.5 'reads', Lhs.2 'source', Lhs.3 'scReads', Lhs.4 'scStores', Lhs.7 'node', Lhs.6 'stores'
4704       ~0%     {7}    | AND NOT `CaptureModels::PropagateContentFlow::nodeReachesRead/7#063d6ac5#reorder_4_5_0_1_2_3_6#prev`(FIRST 7)
                                         return r1

This is a pre-requisite for further field based model generation for java.

With this performance improvement a quick and dirty field based model generation for the java sdk yielded