Update .travis.yml

Install libmyodbc. Set CMwke property SOCI_ODBC_TEST_MYSQL_CONNSTR.

.travis.yml

@@ -15,7 +15,7 @@ services:
 
 before_install:
   - sudo apt-get update -qq
-  - sudo apt-get install -qq libboost-dev libboost-date-time-dev unixodbc-dev odbc-postgresql firebird2.5-super firebird2.5-dev
+  - sudo apt-get install -qq libboost-dev libboost-date-time-dev libmyodbc unixodbc-dev odbc-postgresql firebird2.5-super firebird2.5-dev
 
 before_script:
   - mysql --version
@@ -26,7 +26,7 @@ before_script:
 script:
   - mkdir -p src/_build
   - cd src/_build
-  - cmake -DSOCI_TESTS=ON -DSOCI_EMPTY_TEST_CONNSTR:STRING="dummy connection" -DSOCI_MYSQL_TEST_CONNSTR:STRING="db=soci_test" -DSOCI_POSTGRESQL_TEST_CONNSTR:STRING="dbname=soci_test user=postgres" -DSOCI_SQLITE3_TEST_CONNSTR:STRING="soci_test.db" -DSOCI_ODBC_TEST_POSTGRESQL_CONNSTR="FILEDSN=${PWD}/../backends/odbc/test/test-postgresql.dsn;" ..
+  - cmake -DSOCI_TESTS=ON -DSOCI_EMPTY_TEST_CONNSTR:STRING="dummy connection" -DSOCI_MYSQL_TEST_CONNSTR:STRING="db=soci_test" -DSOCI_POSTGRESQL_TEST_CONNSTR:STRING="dbname=soci_test user=postgres" -DSOCI_SQLITE3_TEST_CONNSTR:STRING="soci_test.db" -DSOCI_ODBC_TEST_POSTGRESQL_CONNSTR="FILEDSN=${PWD}/../backends/odbc/test/test-postgresql.dsn;" -DSOCI_ODBC_TEST_MYSQL_CONNSTR="FILEDSN=${PWD}/../backends/odbc/test/test-mysql.dsn;" ..
   - cmake --build .
   - ctest -V --output-on-failure .