HIVE-29516 Fix whitespace related to test failure

Author: shubhluck

ql/src/test/results/clientpositive/llap/semijoin_stats_missing_colstats.q.out

@@ -58,7 +58,7 @@ STAGE PLANS:
         Reducer 4 <- Map 3 (CUSTOM_SIMPLE_EDGE)
 #### A masked pattern was here ####
       Vertices:
-        Map 1
+        Map 1 
             Map Operator Tree:
                 TableScan
                   alias: t1
@@ -80,7 +80,7 @@ STAGE PLANS:
                         value expressions: _col1 (type: string)
             Execution mode: vectorized, llap
             LLAP IO: all inputs
-        Map 3
+        Map 3 
             Map Operator Tree:
                 TableScan
                   alias: t2
@@ -111,13 +111,13 @@ STAGE PLANS:
                           outputColumnNames: _col0, _col1, _col2
                           Statistics: Num rows: 1 Data size: 340 Basic stats: COMPLETE Column stats: NONE
                           Reduce Output Operator
-                            null sort order:
-                            sort order:
+                            null sort order: 
+                            sort order: 
                             Statistics: Num rows: 1 Data size: 340 Basic stats: COMPLETE Column stats: NONE
                             value expressions: _col0 (type: int), _col1 (type: int), _col2 (type: binary)
             Execution mode: vectorized, llap
             LLAP IO: all inputs
-        Reducer 2
+        Reducer 2 
             Execution mode: llap
             Reduce Operator Tree:
               Merge Join Operator
@@ -139,7 +139,7 @@ STAGE PLANS:
                         input format: org.apache.hadoop.mapred.SequenceFileInputFormat
                         output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
                         serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
-        Reducer 4
+        Reducer 4 
             Execution mode: vectorized, llap
             Reduce Operator Tree:
               Group By Operator
@@ -148,8 +148,8 @@ STAGE PLANS:
                 outputColumnNames: _col0, _col1, _col2
                 Statistics: Num rows: 1 Data size: 340 Basic stats: COMPLETE Column stats: NONE
                 Reduce Output Operator
-                  null sort order:
-                  sort order:
+                  null sort order: 
+                  sort order: 
                   Statistics: Num rows: 1 Data size: 340 Basic stats: COMPLETE Column stats: NONE
                   value expressions: _col0 (type: int), _col1 (type: int), _col2 (type: binary)
 
@@ -158,3 +158,4 @@ STAGE PLANS:
       limit: -1
       Processor Tree:
         ListSink
+