pgsql: Reorder identity regression test

Reorder identity regression test

The previous test order had the effect that if something was wrong
with the identity functionality, the create_table_like test would
likely fail or crash first, which is confusing. Reorder so that the
identity test comes before create_table_like.

Branch
------
master

Details
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https://git.postgresql.org/pg/commitdiff/2fadf24e249bd72fc517663a91a233437460671c

Modified Files
--------------
src/test/regress/expected/identity.out | 1 +
src/test/regress/expected/sanity_check.out | 2 --
src/test/regress/parallel_schedule | 8 ++++----
src/test/regress/serial_schedule | 4 ++--
src/test/regress/sql/identity.sql | 2 ++
5 files changed, 9 insertions(+), 8 deletions(-)