### What is this PR for?
Allow users to issue insert/update/upsert statements from Zeppelin notes
### What type of PR is it?
Improvement
### Todos
* [ ] - Task
### What is the Jira issue?
[ZEPPELIN-1645](https://issues.apache.org/jira/browse/ZEPPELIN-1645)
### How should this be tested?
For Phoenix Interpreter:
Paragraph 1:
%jdbc
UPSERT INTO CX_TEST (ACCT_NBR, HSE_ID) VALUES ('a', 'b')
Paragraph 2:
%jdbc
select count(*) from cx_test
Result: 1
### Questions:
* Does the licenses files need update?
No
* Is there breaking changes for older versions?
No
* Does this needs documentation?
Yes - JDBC README updated
Author: Randy Gelhausen <rgelhau@gmail.com>
Closes#1617 from randerzander/master and squashes the following commits:
1cf1ce3 [Randy Gelhausen] Added check for connection autocommit status