[TD-2827]<fix>: fix JDBC-RESTful resultSet and restSetMetaData bugs

fix sql empty issue

bugfix on mac and pressure-test

[TD-2831]<feature>add email file in pkg

[TD-2818]add lock for db field access

2. SystemUid

[TD-2832]<fix>: use httpDecodeUrl to parse reserved characters after …

[TD-2840]<test>Add email notification for jenkins

Run a full test for the code submitted by freemine

[TD-2781]taosd crashes when query tag is nchar

Feature/win