clang-format: Update to match docs repo

Update the .clang-format file and run clang-format-6.0.
This .clang-format matches the example one in
https://github.com/openbmc/docs/blob/master/cpp-style-and-conventions.md#clang-formatting

Change-Id: Ia331c9a5b040e1a3c45a0ebf1b8d776d93b05ae5
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/vlan_interface.hpp b/vlan_interface.hpp
index e1feda7..3ef98eb 100644
--- a/vlan_interface.hpp
+++ b/vlan_interface.hpp
@@ -17,7 +17,6 @@
 class EthernetInterface;
 class Manager;
 
-
 using DeleteIface = sdbusplus::xyz::openbmc_project::Object::server::Delete;
 using VlanIface = sdbusplus::xyz::openbmc_project::Network::server::VLAN;
 
@@ -29,52 +28,48 @@
                       public DeleteIface,
                       public EthernetInterface
 {
-    public:
-        VlanInterface() = delete;
-        VlanInterface(const VlanInterface&) = delete;
-        VlanInterface& operator=(const VlanInterface&) = delete;
-        VlanInterface(VlanInterface&&) = delete;
-        VlanInterface& operator=(VlanInterface&&) = delete;
-        virtual ~VlanInterface() = default;
+  public:
+    VlanInterface() = delete;
+    VlanInterface(const VlanInterface&) = delete;
+    VlanInterface& operator=(const VlanInterface&) = delete;
+    VlanInterface(VlanInterface&&) = delete;
+    VlanInterface& operator=(VlanInterface&&) = delete;
+    virtual ~VlanInterface() = default;
 
-        /** @brief Constructor to put object onto bus at a dbus path.
-         *  @param[in] bus - Bus to attach to.
-         *  @param[in] objPath - Path to attach at.
-         *  @param[in] dhcpEnabled - DHCP enable value.
-         *  @param[in] vlanID - vlan identifier.
-         *  @param[in] intf - ethernet interface object.
-         *  @param[in] manager - network manager object.
-         */
-        VlanInterface(sdbusplus::bus::bus& bus,
-                      const std::string& objPath,
-                      bool dhcpEnabled,
-                      uint32_t vlanID,
-                      EthernetInterface& intf,
-                      Manager& manager);
+    /** @brief Constructor to put object onto bus at a dbus path.
+     *  @param[in] bus - Bus to attach to.
+     *  @param[in] objPath - Path to attach at.
+     *  @param[in] dhcpEnabled - DHCP enable value.
+     *  @param[in] vlanID - vlan identifier.
+     *  @param[in] intf - ethernet interface object.
+     *  @param[in] manager - network manager object.
+     */
+    VlanInterface(sdbusplus::bus::bus& bus, const std::string& objPath,
+                  bool dhcpEnabled, uint32_t vlanID, EthernetInterface& intf,
+                  Manager& manager);
 
-        /** @brief Delete this d-bus object.
-         */
-        void delete_() override;
+    /** @brief Delete this d-bus object.
+     */
+    void delete_() override;
 
-        /** @brief writes the device configuration.
-                   systemd reads this configuration file
-                   and creates the vlan interface.*/
-        void writeDeviceFile();
+    /** @brief writes the device configuration.
+               systemd reads this configuration file
+               and creates the vlan interface.*/
+    void writeDeviceFile();
 
-        /** @brief copy the mac address from the parent interface.*/
-        void updateMacAddress()
-        {
-            MacAddressIntf::mACAddress(parentInterface.mACAddress());
-        }
+    /** @brief copy the mac address from the parent interface.*/
+    void updateMacAddress()
+    {
+        MacAddressIntf::mACAddress(parentInterface.mACAddress());
+    }
 
-    private:
+  private:
+    /** @brief VLAN Identifier. */
+    using VlanIface::id;
 
-        /** @brief VLAN Identifier. */
-        using VlanIface::id;
+    EthernetInterface& parentInterface;
 
-        EthernetInterface& parentInterface;
-
-        friend class TestVlanInterface;
+    friend class TestVlanInterface;
 };
 
 } // namespace network