@Override
    public String toString() {
      return "Request { entities = " + entities + " }";
    }
Match a CacheTag to this eviction request. Must only be used on LLAP side only, where the received request may
only contain one information for one DB.

@param cacheTag
@return true if cacheTag matches and the related buffer is eligible for proactive eviction, false otherwise.
ql/src/java/org/apache/hadoop/hive/llap/ProactiveEviction.java