Update DBus initialization and use

The DBus instance variable is no longer a passed parameter to instance
methods.  Instance methods can access the private DBus variable directly.

Change-Id: Id0c988802e5ad6c2757e7a243ee92331f447ac0d
Signed-off-by: Johnathan Mantey <johnathanx.mantey@intel.com>
diff --git a/user_channel/channel_mgmt.hpp b/user_channel/channel_mgmt.hpp
index 02f951b..8b81391 100644
--- a/user_channel/channel_mgmt.hpp
+++ b/user_channel/channel_mgmt.hpp
@@ -308,7 +308,6 @@
 
     /** @brief function to set D-Bus property value
      *
-     *  @param[in] bus - bus
      *  @param[in] service - service name
      *  @param[in] objPath - object path
      *  @param[in] interface - interface
@@ -317,14 +316,12 @@
      *
      *  @return 0 for success, -errno for failure.
      */
-    int setDbusProperty(sdbusplus::bus::bus& bus, const std::string& service,
-                        const std::string& objPath,
+    int setDbusProperty(const std::string& service, const std::string& objPath,
                         const std::string& interface,
                         const std::string& property, const DbusVariant& value);
 
     /** @brief function to get D-Bus property value
      *
-     *  @param[in] bus - bus
      *  @param[in] service - service name
      *  @param[in] objPath - object path
      *  @param[in] interface - interface
@@ -333,8 +330,7 @@
      *
      *  @return 0 for success, -errno for failure.
      */
-    int getDbusProperty(sdbusplus::bus::bus& bus, const std::string& service,
-                        const std::string& objPath,
+    int getDbusProperty(const std::string& service, const std::string& objPath,
                         const std::string& interface,
                         const std::string& property, DbusVariant& value);