Upgrade maven-compiler plugin and add more memory to the compiler

quickfixj-core module compilation run out of memory and doesn't complete on my environment.
Adding more memory to the compiler at th pom level seems to solve the issue :

<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<fork>true</fork>
<meminitial>128m</meminitial>
<maxmem>512m</maxmem>
<source>$

</target>
</configuration>
</plugin>