MULE-7299: Removed old pljugin configurations from poms
Moved repeated configurations to parent pom
Removed JDK6 profile branch in JDBC transport, merged JDK7 profile folder into the main source folder
MULE-7299: Removed commented sections in main pom.xml
Merge pull request #379 from mulesoft/MULE-7299

MULE-7299: Removed old plugin configurations from poms