Upgrade to spring framework 4.1.7 pinpoint-apm#765

 change spring configuration file to use versionless schema .
 (It is recommended to use the "versionless")

quickstart/testapp/src/main/resources/applicationContext-testapp.xml

@@ -1,4 +1,4 @@
-\<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context="http://www.springframework.org/schema/context"