Modification and creation.

1. Modified data structure from List<Map<String, String> to Map<String,
Map<String, String>> for the efficiency of data searching. It related to
com.hcb.commons.Data(deprecated), com.hcb.commons.HcbData,
com.hcb.utils.DataUtils.
2. Modified parameter type from Object to "? extends Object" for the
sake of the expansibility, which affected com.hcb.data.DataFileRW,
com.hcb.data.BasicDataRW.
3. Add a new TestCase (under JUnit 4 library) to test
com.hcb.utils.DataUtils, and fortunately all the tests for that class
are accepted, com.hcb.utils.testcases.TestDatUtils.

Signed-off-by: lrcry <lrcry@vip.qq.com>