entity-manager: encapsulation for PerformScan

class PerformScan has a bunch of members which are not used outside the
class. Mark those as 'private' to avoid any accidental use in new
code. We can always go back to make things public as necessary, but it
should not be that way for all members.

Tested: Inspection only.

Change-Id: Ice493a1b04006da89fe15ec62c57f7ac5112cd43
Signed-off-by: Alexander Hansen <alexander.hansen@9elements.com>
diff --git a/src/entity_manager/perform_scan.hpp b/src/entity_manager/perform_scan.hpp
index b482d7b..317177e 100644
--- a/src/entity_manager/perform_scan.hpp
+++ b/src/entity_manager/perform_scan.hpp
@@ -35,12 +35,14 @@
     void run();
     virtual ~PerformScan();
     EntityManager& _em;
+    MapperGetSubTreeResponse dbusProbeObjects;
+    std::vector<std::string> passedProbes;
+
+  private:
     nlohmann::json& _missingConfigurations;
     std::vector<nlohmann::json> _configurations;
     std::function<void()> _callback;
     bool _passed = false;
-    MapperGetSubTreeResponse dbusProbeObjects;
-    std::vector<std::string> passedProbes;
 
     boost::asio::io_context& io;
 };