build: update mysql-connector-java to 5.1.49

Changelogs:
- https://dev.mysql.com/blog-archive/mysql-connector-j-5-1-47-ga-has-been-released/
- https://dev.mysql.com/blog-archive/mysql-connector-j-5-1-48/
- https://dev.mysql.com/blog-archive/mysql-connector-j-5-1-49-ga-has-been-released/

Fix #1184

Author: php-coder

pom.xml

@@ -625,7 +625,7 @@
 		<minify.plugin.version>1.7.6</minify.plugin.version>
 
 		<!-- Redefine default value from spring-boot-dependencies -->
-		<mysql.version>5.1.46</mysql.version>
+		<mysql.version>5.1.49</mysql.version>
 
 		<native2ascii.plugin.version>2.0.1</native2ascii.plugin.version>
 		<owasp-plugin.version>3.0.2</owasp-plugin.version>