Improve restore table mapping

[Slach]

fix #1302

[coveralls]

Pull Request Test Coverage Report for Build 19827391514

Details

• 124 of 164 (75.61%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall first build on improve_restore_table_mapping at 68.751%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/backup/table_pattern.go	26	35	74.29%
pkg/backup/backuper.go	13	27	48.15%
pkg/backup/restore.go	82	99	82.83%

Totals
Change from base Build 19827303177:	68.8%
Covered Lines:	11148
Relevant Lines:	16215

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💛 - Coveralls