title: conflicts between spring-mongo and spring-cassandra
body: <p>1.Work well with spring-mongo in microservice.</p>
  
  <p>2.Work well with spring-cassandra in microservice.</p>
  
  <p>build project with gradle.</p>
  
  <p>but when i add spring-cassandra into spring-mongo,there are errors.even just import spring-cassandra dependencies,without any cassandra </p>
  
  <pre><code>compile "org.springframework.data:spring-cql:1.5.0.M1"
  compile "org.springframework.data:spring-data-cassandra:1.5.0.M1"
  compile "com.datastax.cassandra:cassandra-driver-core:3.0.1"
  </code></pre>
  
  <p>The error trace is too long.just take a summary.
  throw exceptions </p>
  
  <p>`         ``</p>
  
  <pre><code>org.springframework.beans.factory.BeanCreationException
  com.datastax.driver.core.exceptions.NoHostAvailableException
  </code></pre>
  
  <p>not caused by one class.when i run the test with gradle.all testcase throw this exception.and spring boot application cannot start.which worked well before.</p>
  
  <p>and i have not added any java code to call datastax driver to connect cassandra.dont know why there is an exception about cassandra connection.</p>