Add .travis.yml for running tests using MS SQL docker image

Reference for installing `pyodbc` dependencies.

 - https://github.com/mkleehammer/pyodbc/wiki/Install
 - mkleehammer/pyodbc#685

Connection to MSSQL docker is made with FreeTDS driver.
The following bug explains the manual configuration.

https://bugs.launchpad.net/ubuntu/+source/freetds/+bug/1173083

.travis.yml

@@ -0,0 +1,17 @@
+language: python
+
+dist: bionic
+
+install:
+  # MSSQL support, 4 lines
+  # until https://github.com/epam/OSCI/issues/2 is fixed
+  - docker run -e 'ACCEPT_EULA=Y' -e 'SA_PASSWORD=yourStrong(!)Password' -e 'MSSQL_PID=Express' -p 127.0.0.1:1433:1433 -d mcr.microsoft.com/mssql/server:2017-latest-ubuntu
+  - sudo apt-get -y install unixodbc-dev tdsodbc
+  - sudo odbcinst -i -d -f /usr/share/tdsodbc/odbcinst.ini
+
+  - pip install -r requirements.txt
+
+script:
+  # test connection
+  - python dbconnector.py
+