[SPARK-17719][SPARK-17776][SQL] Unify and tie up options in a single place in...

[SPARK-17719][SPARK-17776][SQL] Unify and tie up options in a single place in JDBC datasource package

## What changes were proposed in this pull request?

This PR proposes to fix arbitrary usages among `Map[String, String]`, `Properties` and `JDBCOptions` instances for options in `execution/jdbc` package and make the connection properties exclude Spark-only options.

This PR includes some changes as below:

  - Unify `Map[String, String]`, `Properties` and `JDBCOptions` in `execution/jdbc` package to `JDBCOptions`.

- Move `batchsize`, `fetchszie`, `driver` and `isolationlevel` options into `JDBCOptions` instance.

- Document `batchSize` and `isolationlevel` with marking both read-only options and write-only options. Also, this includes minor types and detailed explanation for some statements such as url.

- Throw exceptions fast by checking arguments first rather than in execution time (e.g. for `fetchsize`).

- Exclude Spark-only options in connection properties.

## How was this patch tested?

Existing tests should cover this.

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #15292 from HyukjinKwon/SPARK-17719.