fix an script issue

fvt_scripts/edgex_sink_rule.jmx

@@ -420,7 +420,7 @@
           <JSONPathAssertion guiclass="JSONPathAssertionGui" testclass="JSONPathAssertion" testname="device Assertion" enabled="true">
             <stringProp name="JSON_PATH">$.device</stringProp>
             <stringProp name="EXPECTED_VALUE">demo</stringProp>
-            <boolProp name="JSONVALIDATION">true</boolProp>
+            <boolProp name="JSONVALIDATION">false</boolProp>
             <boolProp name="EXPECT_NULL">false</boolProp>
             <boolProp name="INVERT">false</boolProp>
             <boolProp name="ISREGEX">false</boolProp>
@@ -429,7 +429,7 @@
           <JSONPathAssertion guiclass="JSONPathAssertionGui" testclass="JSONPathAssertion" testname="humidity Assertion" enabled="true">
             <stringProp name="JSON_PATH">$.readings[0].value</stringProp>
             <stringProp name="EXPECTED_VALUE">81</stringProp>
-            <boolProp name="JSONVALIDATION">true</boolProp>
+            <boolProp name="JSONVALIDATION">false</boolProp>
             <boolProp name="EXPECT_NULL">false</boolProp>
             <boolProp name="INVERT">false</boolProp>
             <boolProp name="ISREGEX">false</boolProp>