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/Element.h b/parameter/Element.h
index 6e5abc9..d870145 100644
--- a/parameter/Element.h
+++ b/parameter/Element.h
@@ -45,7 +45,8 @@
     virtual ~CElement();
 
     // Logging
-    void log(const string& strMessage, ...) const;
+    void log_info(const string& strMessage, ...) const;
+    void log_warning(const string& strMessage, ...) const;
 
     // Description
     void setDescription(const string& strDescription);
@@ -119,7 +120,7 @@
     const CElement* getRoot() const;
 private:
     // Logging (done by root)
-    virtual void doLog(const string& strLog) const;
+    virtual void doLog(bool bIsWarning, const string& strLog) const;
     virtual void nestLog() const;
     virtual void unnestLog() const;
     // Returns Name or Kind if no Name