[MINOR] Fix parfor result merge tests (disable auto vectorization)

We have to disable auto vectorization here in order to test the parfor
specifics (in this case, spark jobs for result merge)

Author: mboehm7

src/test/scripts/functions/parfor/parfor_pr_resultmerge1c.dml

@@ -28,8 +28,9 @@ R1 = matrix(0,rows=m,cols=n);
 parfor( i in 1:(n-7), par=8, mode=REMOTE_SPARK, resultmerge=REMOTE_SPARK, taskpartitioner=FACTORING, opt=NONE )
 {
    X = V[,i];
+   while(FALSE){} # prevent auto vectorization
    R1[,i] = X;
-}   
+}
 
-R = R1 + R1; 
-write(R, $4);       
+R = R1 + R1;
+write(R, $4);

src/test/scripts/functions/parfor/parfor_pr_resultmerge1d.dml

@@ -7,9 +7,9 @@
 # to you under the Apache License, Version 2.0 (the
 # "License"); you may not use this file except in compliance
 # with the License.  You may obtain a copy of the License at
-# 
+#
 #   http://www.apache.org/licenses/LICENSE-2.0
-# 
+#
 # Unless required by applicable law or agreed to in writing,
 # software distributed under the License is distributed on an
 # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
@@ -28,8 +28,9 @@ R1 = matrix(1,rows=m,cols=n);
 parfor( i in 1:(n-7), par=8, mode=REMOTE_SPARK, resultmerge=REMOTE_SPARK, taskpartitioner=FACTORING, opt=NONE )
 {
    X = V[,i];
+   while(FALSE){} # prevent auto vectorization
    R1[,i] = X;
-}   
+}
 
-R = R1 + R1; 
-write(R, $4);       
+R = R1 + R1;
+write(R, $4);