Moved MQ0 out of HC exclusion and into StandardUGAnnotation

public/gatk-tools-public/src/main/java/org/broadinstitute/gatk/tools/walkers/annotator/MappingQualityZeroBySample.java

@@ -50,7 +50,7 @@
  * <p>This annotation gives you the count of all reads that have MAPQ = 0 for each sample. The count of reads with MAPQ0 can be used for quality control; high counts typically indicate regions where it is difficult to make confident calls.</p>
  *
  * <h3>Caveat</h3>
- * <p>This annotation is excluded by HaplotypeCaller because HC filters out all reads with MQ0 upfront, so the annotation would always return a value of 0 anyway.</p>
+ * <p>It is not useful to apply this annotation with HaplotypeCaller because HC filters out all reads with MQ0 upfront, so the annotation will always return a value of 0.</p>
  *
  * <h3>Related annotations</h3>
  * <ul>