IGNITE-6815 NPE when using expiry policy: storeLoadedVal needs to be …

…set at each branch of these conditionals or NPE in inevitible. - Fixes #3726.

Signed-off-by: dpavlov <dpavlov@apache.org>

modules/core/src/main/java/org/apache/ignite/internal/processors/cache/GridCacheMapEntry.java

@@ -4708,6 +4708,7 @@ else if (updateExpireTime && expiryPlc != null && entry.val != null){
                         expiryPlc.ttlUpdated(entry.key, entry.ver, null);
 
                         needUpdate = true;
+                        storeLoadedVal = entry.val;
                     }
                 }
             }