JWT support in JDBC driver

[mshustov]

scope:

• ability to attach an JWT token
• ability to overwrite the token on the client instance

blocked by #1834

[chernser]

Passing JWT token in initial config is not a problem (may be thru URL will be problematic, but I hope it will not be a case).
The problem is to update. Usually there is some token manager with registered callback or function that returns token for operation.

JDBC is configured thru one of two ways:

1. url parameters
2. properties

There is not problem to pass some instance of a class that returns tokens thru properties. Using URL we can pass only string.
But we can limit solution only for properties.