Avoid throwing exceptions during test clean up
We can now delete an entire table or target records in a table
Improve update test and fix uncovered bug
Return row count of inserts, deletes and updates.

--HG--
rename : src/test/java/com/vtence/tape/testmodel/UpdateStatementTest.java => src/test/java/com/vtence/tape/UpdateStatementTest.java
Drop usage of Select#single in favor of Select#first.

Let client code decide on what to do with multiple records when only a single one was expected.
Silence Flyway logging during tests
We now constrain the number of rows to 1 when fetching the first record.