To implement support for Presto some changes in common
classes are required.

## Changes in common classes:
1. class sqlancer.MainOptions - added global parameters :
 * canonicalizeString (boolean) - presto doesn't support JDBC
     queries with ";" at the end of statement
 * compareResultsContent (boolean) - comparing content of
     VARBINARY columns fails

2. class sqlancer.ComparatorHelper - compare result based on parameter

```
    boolean compare = state.getOptions().compareResultsContent();
    if (compare && !firstHashSet.equals(secondHashSet)) {
```

3. sqlancer.common.query.SQLancerResultSet - added method:

```
    public String getType(int i) throws SQLException {
    return rs.getMetaData().getColumnTypeName(i);
    }
```

4. sqlancer.common.query.SQLQueryAdapter : added constructor

```
    public SQLQueryAdapter(String query, ExpectedErrors expectedErrors,
        boolean couldAffectSchema, boolean canonicalizeString) {

```