jdbc: metadata: support identifiers metainfo

[Totktonada]

DatabaseMetaData.

We need to correctly set and test the following methods.

Identifiers case-sensetivity:

• supportsMixedCaseIdentifiers -- should be false
• storesUpperCaseIdentifiers -- should be true
• storesLowerCaseIdentifiers -- false (ok)
• storesMixedCaseIdentifiers -- should be false
• supportsMixedCaseQuotedIdentifiers -- should be true
• storesUpperCaseQuotedIdentifiers -- false (ok)
• storesLowerCaseQuotedIdentifiers -- false (ok)
• storesMixedCaseQuotedIdentifiers -- false (ok)

Identifiers metainfo:

• getSQLKeywords

Max length:

• getMaxBinaryLiteralLength
• getMaxCatalogNameLength
• getMaxCharLiteralLength
• getMaxColumnNameLength
• getMaxCursorNameLength
• getMaxIndexLength
• getMaxProcedureNameLength
• getMaxSchemaNameLength
• getMaxStatementLength
• getMaxTableNameLength
• getMaxUserNameLength

Identifiers operations:

• getIdentifierQuoteString
• getSearchStringEscape
• getExtraNameCharacters

Terms:

• getSchemaTerm
• getProcedureTerm
• getCatalogTerm