obs_dumpversion and associated tests

src/pg/test/expected/40_observatory_utility_test.out

@@ -27,3 +27,6 @@ t
 _obs_standardizemeasurename_test
 t
 (1 row)
+obs_getdumpversion_notnull
+t
+(1 row)

src/pg/test/fixtures/drop_fixtures.sql

@@ -6,6 +6,7 @@ DROP TABLE IF EXISTS observatory.obs_column;
 DROP TABLE IF EXISTS observatory.obs_column_tag;
 DROP TABLE IF EXISTS observatory.obs_tag;
 DROP TABLE IF EXISTS observatory.obs_column_to_column;
+DROP TABLE IF EXISTS observatory.obs_dump_version;
 DROP TABLE IF EXISTS observatory.obs_65f29658e096ca1485bf683f65fdbc9f05ec3c5d;
 DROP TABLE IF EXISTS observatory.obs_1746e37b7cd28cb131971ea4187d42d71f09c5f3;
 DROP TABLE IF EXISTS observatory.obs_1a098da56badf5f32e336002b0a81708c40d29cd;

src/pg/test/sql/40_observatory_utility_test.sql

@@ -75,4 +75,7 @@ SELECT cdb_observatory._OBS_GetRelatedColumn(
 -- should give back a standardized measure name
 SELECT cdb_observatory._OBS_StandardizeMeasureName('test 343 %% 2 qqq }}{{}}') = 'test_343_2_qqq' As _OBS_StandardizeMeasureName_test;
 
+SELECT cdb_observatory.OBS_GetDumpVersion()
+  IS NOT NULL AS OBS_GetDumpVersion_notnull;
+
 \i test/fixtures/drop_fixtures.sql