Support to check whether the table can be duplicated by CDC

[zier-one]

What problem does this PR solve?

Support to check whether the table can be duplicated by CDC

What is changed and how it works?

we check table in the following step:

1. creating the changefeed
2. handling DDL jobs in the owner

Check List

Tests

• Unit test
• Integration test

Run those sql in upstream db:

MySQL [test]> create table t1(a int ,b int);
Query OK, 0 rows affected (0.308 sec)

MySQL [test]> create table t2(a int unique key null ,b int);
Query OK, 0 rows affected (0.241 sec)

MySQL [test]> create table t3(a int unique key not null ,b int);
Query OK, 0 rows affected (0.750 sec)

create a changefeed:

[my-devel]➜ bin git:(check_table) ✗ ./cdc cli changefeed create --sink-uri="mysql://root@127.0.0.1:3306/"
[WARN] some tables are not eligible to duplicate, []entry.TableName{entry.TableName{Schema:"test", Table:"t1"}, entry.TableName{Schema:"test", Table:"t2"}}
Could you agree to ignore those tables, and continue to duplicate [Y/N]
N
[my-devel]➜ bin git:(check_table) ✗ ./cdc cli changefeed create --sink-uri="mysql://root@127.0.0.1:3306/" --no-confirm
[WARN] some tables are not eligible to duplicate, []entry.TableName{entry.TableName{Schema:"test", Table:"t1"}, entry.TableName{Schema:"test", Table:"t2"}}
create changefeed ID: 9a4603c1-5dda-4279-9001-ae01acd294b0 info {"sink-uri":"mysql://root@127.0.0.1:3306/","opts":{},"create-time":"2020-03-24T11:43:22.130405373+08:00","start-ts":415503850433675265,"target-ts":0,"admin-job-type":0,"config":{"filter-case-sensitive":false,"filter-rules":null,"ignore-txn-commit-ts":null}}

[zier-one]

/run-integration-tests

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/run-integration-tests

[zier-one]

/run-integration-tests

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/run-integration-tests

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/run-integration-tests

[zier-one]

/run-integration-tests

[zier-one]

/run-integration-tests

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/run-integration-tests

[zier-one]

@amyangfei PTAL again

[zier-one]

/run-integration-tests

[zier-one]

/run-integration-tests

[zier-one]

/run-integration-tests

[amyangfei]

LGTM