PFW: Do not stop on hard sync errors

BZ: 76263

When synchronization fails, the parameter-framework should
log a warning and continue synchronization instead of stopping

Change-Id: Ic12d8798ea25584db714ee26e644fac793c28881
Signed-off-by: Kevin Rocard <kevinx.rocard@intel.com>
Reviewed-on: http://android.intel.com:8080/81825
Reviewed-by: Centelles, Sylvain <sylvain.centelles@intel.com>
Reviewed-by: Denneulin, Guillaume <guillaume.denneulin@intel.com>
Tested-by: Dixon, CharlesX <charlesx.dixon@intel.com>
Reviewed-by: cactus <cactus@intel.com>
Tested-by: cactus <cactus@intel.com>
diff --git a/parameter/HardwareBackSynchronizer.h b/parameter/HardwareBackSynchronizer.h
index 250ad63..2f0d503 100644
--- a/parameter/HardwareBackSynchronizer.h
+++ b/parameter/HardwareBackSynchronizer.h
@@ -30,7 +30,7 @@
 class CHardwareBackSynchronizer : public CBackSynchronizer
 {
 public:
-    CHardwareBackSynchronizer(const CConfigurableElement* pConfigurableElement, string& strError, CParameterBlackboard* pParameterBlackboard);
+    CHardwareBackSynchronizer(const CConfigurableElement* pConfigurableElement, CParameterBlackboard* pParameterBlackboard);
 
     // Back synchronization
     virtual bool sync();
@@ -38,8 +38,6 @@
 private:
     // Back syncer set
     CSyncerSet _backSyncerSet;
-    // Error
-    string& _strError;
     // Parameter blackboard
     CParameterBlackboard* _pParameterBlackboard;
 };