Update travis test status and position in README file

README.md

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+* [![tests status](https://secure.travis-ci.org/MariaDB/server.png?branch=10.3)](https://travis-ci.org/MariaDB/server) travis-ci.org (10.3 branch)
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 ## MariaDB: drop-in replacement for MySQL
 
 MariaDB is designed as a drop-in replacement of MySQL(R) with more
@@ -68,8 +73,3 @@ The code for MariaDB, including all revision history, can be found at:
 https://github.com/MariaDB/server
 
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-* [![tests status](https://secure.travis-ci.org/MariaDB/server.png?branch=10.2)](https://travis-ci.org/MariaDB/server) travis-ci.org (10.2 branch)