drop/create less, better indexes

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

@@ -77,5 +77,3 @@ SELECT cdb_observatory._OBS_StandardizeMeasureName('test 343 %% 2 qqq }}{{}}') =
 
 SELECT cdb_observatory.OBS_DumpVersion()
   IS NOT NULL AS OBS_DumpVersion_notnull;
-
-\i test/fixtures/drop_fixtures.sql

src/pg/test/sql/41_observatory_augmentation_test.sql

@@ -1,4 +1,3 @@
-\i test/fixtures/load_fixtures.sql
 \pset format unaligned
 \set ECHO none
 
@@ -236,5 +235,3 @@ SELECT cdb_observatory.OBS_GetMeasureById(
   'us.census.tiger.block_group',
   '2010 - 2014'
 ) IS NULL As OBS_GetMeasureById_nulls;
-
-\i test/fixtures/drop_fixtures.sql

src/pg/test/sql/42_observatory_exploration_test.sql

@@ -1,4 +1,3 @@
-\i test/fixtures/load_fixtures.sql
 \pset format unaligned
 
 -- set up variables for use in testing
@@ -32,5 +31,3 @@ SELECT COUNT(*) > 0 AS _OBS_GetAvailableBoundariesExist
 FROM cdb_observatory.OBS_GetAvailableBoundaries(
   cdb_observatory._TestPoint()
 ) AS t(boundary_id, description, time_span, tablename);
-
-\i test/fixtures/drop_fixtures.sql

src/pg/test/sql/44_observatory_geometries_test.sql

@@ -1,6 +1,5 @@
 \pset format unaligned
 \set ECHO all
-\i test/fixtures/load_fixtures.sql
 
 -- set up variables for use in testing