Unable to find CDI BeanManager

As we discussed in the comments, the solution might be as simple as adding the cdi-api to your pom.xml dependencies. It's not included within the dependencies you specified.

<dependency> 
    <groupId>javax.enterprise</groupId> 
    <artifactId>cdi-api</artifactId> 
    <version>1.2</version> 
</dependency>