Update generated temperature sensor XML definition

Define the floor attribute as observed
diff --git a/simulated-devices/temperatures-generator/src/main/resources/temperature-resource.xml b/simulated-devices/temperatures-generator/src/main/resources/temperature-resource.xml
index 31cc775..a7828d5 100644
--- a/simulated-devices/temperatures-generator/src/main/resources/temperature-resource.xml
+++ b/simulated-devices/temperatures-generator/src/main/resources/temperature-resource.xml
@@ -15,7 +15,7 @@
     <identifier xsi:type="stringContent">TEMPERATURE</identifier>
     <attributes>
     	<attribute name="value" type="double"></attribute>
-    	<attribute name="floor" type="int" modifiable="MODIFIABLE"></attribute>
+    	<attribute name="floor" type="int" modifiable="MODIFIABLE" observed="true"></attribute>
     </attributes>
   </resourceInfo>
 </resourceInfos>
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