[MINOR] Reduced test runtime of paramserv testsuite package

This modification reduces the local test package runtime from 344s to
63s, which simplifies debugging because there are spurious test failures
we need to fix.

Author: mboehm7

src/test/scripts/functions/paramserv/mnist_lenet_paramserv.dml

@@ -360,7 +360,7 @@ generate_dummy_data = function()
    *  - Win: Input width.
    */
   # Generate dummy input data
-  N = 1024  # num examples
+  N = 128  # num examples
   C = 1  # num input channels
   Hin = 28  # input height
   Win = 28  # input width

src/test/scripts/functions/paramserv/mnist_lenet_paramserv_avg.dml

@@ -361,7 +361,7 @@ generate_dummy_data = function()
    *  - Win: Input width.
    */
   # Generate dummy input data
-  N = 1024  # num examples
+  N = 128  # num examples
   C = 1  # num input channels
   Hin = 28  # input height
   Win = 28  # input width

src/test/scripts/functions/paramserv/mnist_lenet_paramserv_minimum_version.dml

@@ -355,7 +355,7 @@ generate_dummy_data = function()
    *  - Win: Input width.
    */
   # Generate dummy input data
-  N = 1024  # num examples
+  N = 128  # num examples
   C = 1  # num input channels
   Hin = 28  # input height
   Win = 28  # input width

src/test/scripts/functions/paramserv/mnist_lenet_paramserv_nbatches.dml

@@ -360,7 +360,7 @@ generate_dummy_data = function()
    *  - Win: Input width.
    */
   # Generate dummy input data
-  N = 1024  # num examples
+  N = 128  # num examples
   C = 1  # num input channels
   Hin = 28  # input height
   Win = 28  # input width