snippet: Updated all snippet tags

Ensure all src C++ headers which have corresponding C++ examples have
doxygen tags which point to those examples.  Some were missing, some
were invalid, some needed to be updated to match the new example names.

Signed-off-by: Noel Eck <noel.eck@intel.com>

src/ozw/aeotecdsb09104.hpp

@@ -35,6 +35,7 @@ namespace upm {
    * @sensor dsb09104
    * @type wifi
    * @con uart
+   * @snippet ozw-aeotecdsb09104.cxx Interesting
    * @man aeon
    * @web http://aeotec.com/z-wave-home-energy-measure/918-home-energy-meter-instructions.html
    *

src/ozw/aeotecdw2e.hpp

@@ -36,6 +36,7 @@ namespace upm {
    * @altname DSB29
    * @type wifi
    * @con uart
+   * @snippet ozw-aeotecdw2e.cxx Interesting
    * @man aeon
    * @web http://aeotec.com/z-wave-door-window-sensor
    *

src/ozw/aeotecsdg2.hpp

@@ -34,6 +34,7 @@ namespace upm {
    * @sensor dg2
    * @comname Aeotec Smart Dimmer Gen 2
    * @con uart
+   * @snippet ozw-aeotecsdg2.cxx Interesting
    * @type wifi
    * @man aeon
    * @web http://aeotec.com/z-wave-in-wall-switches/877-micro-sei-2e-manual-instructions.html

src/ozw/aeotecss6.hpp

@@ -34,6 +34,7 @@ namespace upm {
    * @sensor ss6
    * @comname Aeotec Smart Switch 6
    * @con uart
+   * @snippet ozw-aeotecss6.cxx Interesting
    * @type wifi
    * @man aeon
    * @web http://aeotec.com/z-wave-plug-in-switch

src/ozw/ozwdump.hpp

@@ -41,7 +41,7 @@ namespace upm {
    * (ozwdump), which initializes OZW on a Z-Wave network, and then
    * prints out all Nodes (devices) and their associated valueids.
    *
-   * @snippet ozwdump.cxx
+   * @snippet ozw-ozwdump.cxx Interesting
    */
 
   class OZWDUMP : public ozwInterface {

src/ozw/tzemt400.hpp

@@ -34,6 +34,7 @@ namespace upm {
    * @sensor tzemt400
    * @comname Trane TZEMT400 Z-Wave Thermostat.
    * @con uart
+   * @snippet ozw-tzemt400.cxx Interesting
    * @man trane
    *
    * @brief UPM API for Trane TZEMT400 Z-Wave Thermostat