[Del] remove Ubuntu1804

appveyor.yml

@@ -1,6 +1,5 @@
 image:
   - Visual Studio 2017
-  - Ubuntu1804
 
 services:
   - mysql
@@ -14,16 +13,14 @@ environment:
   VNPY_TEST_POSTGRESQL_USER: postgres
   VNPY_TEST_POSTGRESQL_PASSWORD: Password12!
 
-  matrix:
-    - aaafb: a
-    - bbb: fa
-
 before_build:
   - psql -d postgresql://%VNPY_TEST_POSTGRESQL_USER%:%VNPY_TEST_POSTGRESQL_PASSWORD%@localhost -c "create database vnpy;"
-  - mysql -u %VNPY_TEST_MYSQL_USER% --password=%VNPY_TEST_MYSQL_PASSWORD% -e 'CREATE DATABASE vnpy;'
+  - ls "C:\Program Files"
+  - ls "C:\Program Files\MySQL\"
+  - ps: ls -Rec "C:\Program Files\MySQL\"
+  - ps: . "C:\Program Files\MySQL\MySQL Server 5.7\bin\mysql" -u %VNPY_TEST_MYSQL_USER% --password=%VNPY_TEST_MYSQL_PASSWORD% -e 'CREATE DATABASE vnpy;'
   - python -m pip install --upgrade pip wheel setuptools
 
-
 install:
   - pip install psycopg2 mongoengine pymysql  # we should support all database in test environment
   - pip install https://pip.vnpy.com/colletion/TA_Lib-0.4.17-cp37-cp37m-win_amd64.whl