MAGETWO-72076: Update benchmark.jmx and README files in Performance Toolkit, add performance analytics script

- Benchmarks updated

Author: Andrei Malets

setup/performance-toolkit/benchmark.jmx

@@ -22502,13 +22502,6 @@ vars.put("pages_count_customer", String.valueOf(pageCountCustomers));
                     <stringProp name="Argument.metadata">=</stringProp>
                     <boolProp name="HTTPArgument.use_equals">true</boolProp>
                   </elementProp>
-                  <elementProp name="giftwrapping[quote][863][design]" elementType="HTTPArgument">
-                    <boolProp name="HTTPArgument.always_encode">false</boolProp>
-                    <stringProp name="Argument.name">giftwrapping[quote][863][design]</stringProp>
-                    <stringProp name="Argument.value"></stringProp>
-                    <stringProp name="Argument.metadata">=</stringProp>
-                    <boolProp name="HTTPArgument.use_equals">true</boolProp>
-                  </elementProp>
                   <elementProp name="order[comment][customer_note]" elementType="HTTPArgument">
                     <boolProp name="HTTPArgument.always_encode">false</boolProp>
                     <stringProp name="Argument.name">order[comment][customer_note]</stringProp>