refs #649, skip reading of info objects if only caches are used and emit signals when syncronized from cache

(applied after 1st performance fix for cache was ready)
* utility functions to detect if only caches are used
* renamed some functions
* renamed some db flags and added new ones

src/blackcore/db/databasereaderconfig.h

@@ -56,6 +56,9 @@ namespace BlackCore
             //! Timeout
             void setCacheLifetime(const BlackMisc::PhysicalQuantities::CTime &time);
 
+            //! Will read from swift DB
+            bool possiblyReadsFromSwiftDb() const;
+
             //! Fully initialized
             bool isValid() const;
 
@@ -91,6 +94,9 @@ namespace BlackCore
             //! Update lifetimes
             void setCacheLifetimes(const BlackMisc::PhysicalQuantities::CTime &time);
 
+            //! Will read from swift DB
+            bool possiblyReadsFromSwiftDb() const;
+
             //! Init for mapping tool
             static CDatabaseReaderConfigList forMappingTool();