HBASE-27080 Optimize debug output log of ConstantSizeRegionSplitPolic…

…y class. (#4481)

Signed-off-by: Duo Zhang <zhangduo@apache.org>
(cherry picked from commit 12a9e6e)

Conflicts:
	hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ConstantSizeRegionSplitPolicy.java

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ConstantSizeRegionSplitPolicy.java

@@ -100,15 +100,15 @@ protected final boolean isExceedSize(long sizeToCheck) {
         sumSize += store.getSize();
       }
       if (sumSize > sizeToCheck) {
-        LOG.debug("ShouldSplit because region size is big enough " + "sumSize={}, sizeToCheck={}",
+        LOG.debug("Should split because region size is big enough " + "sumSize={}, sizeToCheck={}",
           StringUtils.humanSize(sumSize), StringUtils.humanSize(sizeToCheck));
         return true;
       }
     } else {
       for (HStore store : region.getStores()) {
         long size = store.getSize();
         if (size > sizeToCheck) {
-          LOG.debug("ShouldSplit because {} size={}, sizeToCheck={}{}", store.getColumnFamilyName(),
+          LOG.debug("Should split because {} size={}, sizeToCheck={}", store.getColumnFamilyName(),
             StringUtils.humanSize(size), StringUtils.humanSize(sizeToCheck));
           return true;
         }