ISPN-4524 ClusteredCacheWithAsyncDirTest.testCombinationOfFilters random...

... failures

https://issues.jboss.org/browse/ISPN-4524

This test has a 100% success rate on a multicore physical machine (the whole query suite runs on under 50 seconds on my machine), but the default timeout makes it fragile on saturated CPU situations such as low-end ec2 instances (where TeamCity runs on)
This can be achieved by declaring a profile in query/pom.xml that is active (i.e., will set threads=5) only if ```infinispan.test.parallel.threads``` is absent.

```
<profiles>
   <profile>
      <id>whatever</id>
      <activation>
         <property>
            <name>!infinispan.test.parallel.threads</name>
         </property>
      </activation>
      <build>
         <plugins>
            <plugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-surefire-plugin</artifactId>
              <configuration>
                <threadCount>5</threadCount>
              </configuration>
            </plugin>
         </plugins>
      </build>
   </profile>
</profiles>
```

But it brings lots of noise :)