Upgrade tomcat-jdbc version

Current tomcat jdbc version has cyclic dependency on the same module,
which causes build failures in some dependency management tool like ivy
+ ant.
Please see the dependency in tomcat jdbc 7.0.19 : http://repo1.maven.org/maven2/org/apache/tomcat/tomcat-jdbc/7.0.19/tomcat-jdbc-7.0.19.pom, the dependency includes self reference as 

```xml
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jdbc</artifactId>
<version>7.0.19</version>
<scope>compile</scope>
</dependency>

```
I have tested with 7.0.27 and updated it. If required We can update to latest version also,