Add tms_test_plan >-< launch relationship

Author: imashkanov

migrations/103_tms_initial.down.sql

@@ -37,6 +37,7 @@ DROP TABLE IF EXISTS tms_test_plan_test_case;
 DROP TABLE IF EXISTS tms_test_case;
 DROP TABLE IF EXISTS tms_test_folder;
 DROP TABLE IF EXISTS tms_milestone;
+DROP TABLE IF EXISTS tms_test_plan_launch;
 DROP TABLE IF EXISTS tms_test_plan;
 DROP TABLE IF EXISTS tms_environment_dataset;
 DROP TABLE IF EXISTS tms_environment;

migrations/103_tms_initial.up.sql

@@ -77,10 +77,18 @@ CREATE TABLE tms_test_plan
             REFERENCES tms_environment,
     product_version_id bigint
         CONSTRAINT tms_test_plan_fk_product_version
-            REFERENCES tms_product_version,
-    launch_id          bigint UNIQUE
-        CONSTRAINT tms_test_plan_fk_launch
-            REFERENCES launch
+            REFERENCES tms_product_version
+);
+
+CREATE TABLE tms_test_plan_launch
+(
+    test_plan_id   bigint
+        CONSTRAINT tms_test_plan_launch_fk_test_plan
+            REFERENCES tms_test_plan,
+    launch_id bigint
+        CONSTRAINT tms_test_plan_launch_fk_launch
+            REFERENCES launch,
+    PRIMARY KEY (test_plan_id, launch_id)
 );
 
 CREATE TABLE tms_milestone