Change artist id in t/sql/coverart.sql

The RebuildCoverArt test is currently failing with:

 # 23505 DBD::Pg::st execute failed: ERROR:
   duplicate key value violates unique constraint "artist_pkey"
 # DETAIL:  Key (id)=(1) already exists.
   [for Statement "SET client_min_messages TO 'warning';

I'm not sure where the conflict arises (given that tests run in
parallel).  Changing the id should resolve it, at least.

Author: mwiencek

t/sql/coverart.sql

@@ -1,20 +1,20 @@
 SET client_min_messages TO 'warning';
 
 INSERT INTO artist (id, gid, name, sort_name)
-    VALUES (1, 'a9d99e40-72d7-11de-8a39-0800200c9a66', 'Artist', 'Artist');
+    VALUES (101, 'a9d99e40-72d7-11de-8a39-0800200c9a66', 'Artist', 'Artist');
 
-INSERT INTO artist_credit (id, name, artist_count) VALUES (1, 'Artist', 1);
+INSERT INTO artist_credit (id, name, artist_count) VALUES (101, 'Artist', 1);
 INSERT INTO artist_credit_name (artist_credit, artist, name, position, join_phrase)
-    VALUES (1, 1, 'Artist', 0, '');
+    VALUES (101, 101, 'Artist', 0, '');
 
 INSERT INTO release_group (id, gid, name, artist_credit)
-    VALUES (1, '3b4faa80-72d9-11de-8a39-0800200c9a66', 'Release #1', 1);
+    VALUES (1, '3b4faa80-72d9-11de-8a39-0800200c9a66', 'Release #1', 101);
 
 INSERT INTO release (id, gid, name, artist_credit, release_group)
-    VALUES (1, 'f34c079d-374e-4436-9448-da92dedef3ce', 'Release #1', 1, 1);
+    VALUES (1, 'f34c079d-374e-4436-9448-da92dedef3ce', 'Release #1', 101, 1);
 
 INSERT INTO release (id, gid, name, artist_credit, release_group)
-    VALUES (2, '7a906020-72db-11de-8a39-0800200c9a66', 'Release #2', 1, 1);
+    VALUES (2, '7a906020-72db-11de-8a39-0800200c9a66', 'Release #2', 101, 1);
 
 INSERT INTO url (id, gid, url)
     VALUES (1, 'd77b3930-2925-11df-8a39-0800200c9a66',