fix: finally fix duplicate key violations on PostgreSQL.

Corrections for 2cf786b and
797a9a7 commits.

Addressed to #1034

Author: php-coder

src/main/resources/liquibase/sql/test-user-admin.sql

@@ -2,5 +2,5 @@
 -- Auto-generated by Maven, based on values from src/main/resources/test/spring/test-data.properties
 --
 
-INSERT INTO users(id, login, role, name, registered_at, activated_at, hash, salt, email) VALUES
-	(2, '@valid_admin_login@', 'ADMIN', 'Site Admin', NOW(), NOW(), '@old_valid_admin_password_hash@', '@old_valid_admin_password_salt@', 'admin@localhost');
+INSERT INTO users(login, role, name, registered_at, activated_at, hash, salt, email) VALUES
+	('@valid_admin_login@', 'ADMIN', 'Site Admin', NOW(), NOW(), '@old_valid_admin_password_hash@', '@old_valid_admin_password_salt@', 'admin@localhost');

src/main/resources/liquibase/version/0.3/2014-02-11--categories.xml

@@ -41,9 +41,9 @@
 			<column name="name" value="Prehistoric animals" />
 			<column name="name_ru" value="Доисторические животные" />
 			<column name="created_at" valueComputed="${NOW}" />
-			<column name="created_by" value="2" /><!-- it's admin -->
+			<column name="created_by" valueComputed="(SELECT id FROM users WHERE role = 'ADMIN' ORDER by id LIMIT 1)" />
 			<column name="updated_at"  valueComputed="${NOW}" />
-			<column name="updated_by" value="2" /><!-- it's admin -->
+			<column name="updated_by" valueComputed="(SELECT id FROM users WHERE role = 'ADMIN' ORDER by id LIMIT 1)" />
 		</insert>
 	</changeSet>
 

src/main/resources/liquibase/version/0.4/2017-11-08--import_series.xml

@@ -134,7 +134,6 @@
 	<changeSet id="add-another-test-series" author="php-coder" context="test-data">
 
 		<insert tableName="series">
-			<column name="id" valueNumeric="2" />
 			<column name="quantity" valueNumeric="3" />
 			<column name="perforated" valueBoolean="false" />
 			<column name="category_id" valueNumeric="1" />