add Teamcity task to verify the build of ml examples

Add a teamcity task to verify that ml examples build successfully. This needs to be verified for both src and bin releases.

For an example of how to build refer this doc at readme.io:

• ...Make sure you're using Java 8 or later.
• Build and install Apache Ignite Data Fabric from the project's root directory:

  mvn clean install -DskipTests -Dmaven.javadoc.skip=true -P java8

• Build and install ML Grid from the project's root directory:

  mvn install -Pml -DskipTests -U -pl modules/ml -am

• ...If you need to build the ML Grid examples from sources execute the commands below:

  cd examples
  mvn clean package -DskipTests -Pml