[8441] Implement check DBs versions (required_* fields) at mangosd/realmd loading.

* git_id updated to generate revision_sql.h file with required_* fields strings.
* mangosd/realmd changed to include header and check this strings at startup.
* mangosd/realmd will terminated if related strings not match in DB content.
  In most cases this meaning that not all expected sql updates applied.
  Current required_* field stored in DB output in error to help find what last sql updates applied.

IMPORTNAT NOTE for mangos devs: please update used git_id before adding next commits with sql updates!

src/realmd/Main.cpp

@@ -31,6 +31,7 @@
 #include "SystemConfig.h"
 #include "revision.h"
 #include "revision_nr.h"
+#include "revision_sql.h"
 #include "Util.h"
 #include <openssl/opensslv.h>
 #include <openssl/crypto.h>
@@ -325,6 +326,9 @@ bool StartDB(std::string &dbstring)
         return false;
     }
 
+    if(!loginDatabase.CheckRequiredField("realmd_db_version",REVISION_DB_REALMD))
+        return false;
+
     return true;
 }