Create UDFContainsArray.java

A udf to count how many str2s are contained in str1, return the number, for example evaluate("abcdabc","abc") will return 2.

This udf has been tested in an offline hive and local java environment, also add a test file TestUDFContainsArray.java to /hive-udf-master/test/src/main/java/com/sankuai/meituan/hive/udf/