PEL: Restore Resolution property for existing PELs

The Resolution D-Bus property is filled in with PEL callouts, but this
wasn't being done on startup for existing PELs. This commit adds that
functionality.

With 2500 PELs this takes a second or less.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I0d8f381d8f1db8e49cf6d46b5b88ee35c242a509
diff --git a/extensions/openpower-pels/manager.hpp b/extensions/openpower-pels/manager.hpp
index 8d0079d..bfe01a1 100644
--- a/extensions/openpower-pels/manager.hpp
+++ b/extensions/openpower-pels/manager.hpp
@@ -63,6 +63,10 @@
             // Create PELEntry interface and setup properties with their values
             createPELEntry(entry.first, true);
         }
+
+        _repo.for_each(
+            std::bind(&Manager::updateResolution, this, std::placeholders::_1));
+
         setupPELDeleteWatch();
     }
 
@@ -409,8 +413,10 @@
      * Update the resolution property of D-bus with callouts extracted from PEL
      *
      * @param[in] pel - The PEL to use
+     *
+     * @return bool - false for Repositor::for_each().
      */
-    void updateResolution(std::unique_ptr<openpower::pels::PEL>& pel);
+    bool updateResolution(const openpower::pels::PEL& pel);
 
     /**
      * @brief Create PELEntry Interface with supported properties