add nos utils
	modified:   conf/config
	new file:   lib/nos-sdk-java-1.2.1.jar
	modified:   pom.xml
	modified:   src/main/java/com/netease/blackqa/utils/CommonString.java
	modified:   src/main/java/com/netease/blackqa/utils/Main.java
	new file:   src/main/java/com/netease/blackqa/utils/NosUtils.java