simplify user cleanup (postfix)

DROP USER IF EXISTS for consistenty with
other drop users.

Author: grooverdan

10.2/docker-entrypoint.sh

@@ -303,7 +303,7 @@ docker_setup_db() {
 		SET @@SESSION.SQL_MODE=REPLACE(@@SESSION.SQL_MODE, 'NO_BACKSLASH_ESCAPES', '');
 
 		DROP USER IF EXISTS root@'127.0.0.1', root@'::1';
-		EXECUTE IMMEDIATE CONCAT('drop user root@\'', @@hostname,'\'');
+		EXECUTE IMMEDIATE CONCAT('DROP USER IF EXISTS root@\'', @@hostname,'\'');
 
 		SET PASSWORD FOR 'root'@'localhost'=PASSWORD('${rootPasswordEscaped}') ;
 		${rootCreate}

10.3/docker-entrypoint.sh

@@ -303,7 +303,7 @@ docker_setup_db() {
 		SET @@SESSION.SQL_MODE=REPLACE(@@SESSION.SQL_MODE, 'NO_BACKSLASH_ESCAPES', '');
 
 		DROP USER IF EXISTS root@'127.0.0.1', root@'::1';
-		EXECUTE IMMEDIATE CONCAT('drop user root@\'', @@hostname,'\'');
+		EXECUTE IMMEDIATE CONCAT('DROP USER IF EXISTS root@\'', @@hostname,'\'');
 
 		SET PASSWORD FOR 'root'@'localhost'=PASSWORD('${rootPasswordEscaped}') ;
 		${rootCreate}

10.4/docker-entrypoint.sh

@@ -303,7 +303,7 @@ docker_setup_db() {
 		SET @@SESSION.SQL_MODE=REPLACE(@@SESSION.SQL_MODE, 'NO_BACKSLASH_ESCAPES', '');
 
 		DROP USER IF EXISTS root@'127.0.0.1', root@'::1';
-		EXECUTE IMMEDIATE CONCAT('drop user root@\'', @@hostname,'\'');
+		EXECUTE IMMEDIATE CONCAT('DROP USER IF EXISTS root@\'', @@hostname,'\'');
 
 		SET PASSWORD FOR 'root'@'localhost'=PASSWORD('${rootPasswordEscaped}') ;
 		${rootCreate}

10.5/docker-entrypoint.sh

@@ -303,7 +303,7 @@ docker_setup_db() {
 		SET @@SESSION.SQL_MODE=REPLACE(@@SESSION.SQL_MODE, 'NO_BACKSLASH_ESCAPES', '');
 
 		DROP USER IF EXISTS root@'127.0.0.1', root@'::1';
-		EXECUTE IMMEDIATE CONCAT('drop user root@\'', @@hostname,'\'');
+		EXECUTE IMMEDIATE CONCAT('DROP USER IF EXISTS root@\'', @@hostname,'\'');
 
 		SET PASSWORD FOR 'root'@'localhost'=PASSWORD('${rootPasswordEscaped}') ;
 		${rootCreate}

10.6/docker-entrypoint.sh

@@ -303,7 +303,7 @@ docker_setup_db() {
 		SET @@SESSION.SQL_MODE=REPLACE(@@SESSION.SQL_MODE, 'NO_BACKSLASH_ESCAPES', '');
 
 		DROP USER IF EXISTS root@'127.0.0.1', root@'::1';
-		EXECUTE IMMEDIATE CONCAT('drop user root@\'', @@hostname,'\'');
+		EXECUTE IMMEDIATE CONCAT('DROP USER IF EXISTS root@\'', @@hostname,'\'');
 
 		SET PASSWORD FOR 'root'@'localhost'=PASSWORD('${rootPasswordEscaped}') ;
 		${rootCreate}

10.7/docker-entrypoint.sh

@@ -303,7 +303,7 @@ docker_setup_db() {
 		SET @@SESSION.SQL_MODE=REPLACE(@@SESSION.SQL_MODE, 'NO_BACKSLASH_ESCAPES', '');
 
 		DROP USER IF EXISTS root@'127.0.0.1', root@'::1';
-		EXECUTE IMMEDIATE CONCAT('drop user root@\'', @@hostname,'\'');
+		EXECUTE IMMEDIATE CONCAT('DROP USER IF EXISTS root@\'', @@hostname,'\'');
 
 		SET PASSWORD FOR 'root'@'localhost'=PASSWORD('${rootPasswordEscaped}') ;
 		${rootCreate}

10.8/docker-entrypoint.sh

@@ -303,7 +303,7 @@ docker_setup_db() {
 		SET @@SESSION.SQL_MODE=REPLACE(@@SESSION.SQL_MODE, 'NO_BACKSLASH_ESCAPES', '');
 
 		DROP USER IF EXISTS root@'127.0.0.1', root@'::1';
-		EXECUTE IMMEDIATE CONCAT('drop user root@\'', @@hostname,'\'');
+		EXECUTE IMMEDIATE CONCAT('DROP USER IF EXISTS root@\'', @@hostname,'\'');
 
 		SET PASSWORD FOR 'root'@'localhost'=PASSWORD('${rootPasswordEscaped}') ;
 		${rootCreate}

docker-entrypoint.sh

@@ -303,7 +303,7 @@ docker_setup_db() {
 		SET @@SESSION.SQL_MODE=REPLACE(@@SESSION.SQL_MODE, 'NO_BACKSLASH_ESCAPES', '');
 
 		DROP USER IF EXISTS root@'127.0.0.1', root@'::1';
-		EXECUTE IMMEDIATE CONCAT('drop user root@\'', @@hostname,'\'');
+		EXECUTE IMMEDIATE CONCAT('DROP USER IF EXISTS root@\'', @@hostname,'\'');
 
 		SET PASSWORD FOR 'root'@'localhost'=PASSWORD('${rootPasswordEscaped}') ;
 		${rootCreate}