samples: load table clustered

[stephaniewang526]

Fixes b/148679900

[codecov]

Codecov Report

Merging #157 into master will decrease coverage by 0.05%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #157      +/-   ##
============================================
- Coverage     77.44%   77.39%   -0.06%     
+ Complexity     1110     1109       -1     
============================================
  Files            73       73              
  Lines          5932     5914      -18     
  Branches        645      631      -14     
============================================
- Hits           4594     4577      -17     
+ Misses         1013     1012       -1     
  Partials        325      325

Impacted Files	Coverage Δ	Complexity Δ
...com/google/cloud/bigquery/StandardSQLDataType.java	73.68% <0%> (-1.32%)	7% <0%> (ø)
...m/google/cloud/bigquery/StandardSQLStructType.java	84.61% <0%> (-1.1%)	5% <0%> (ø)
...ava/com/google/cloud/bigquery/RoutineArgument.java	85.71% <0%> (-0.65%)	5% <0%> (ø)
...google/cloud/bigquery/ExternalTableDefinition.java	56.38% <0%> (-0.46%)	16% <0%> (ø)
...va/com/google/cloud/bigquery/StandardSQLField.java	90.47% <0%> (-0.44%)	7% <0%> (ø)
...java/com/google/cloud/bigquery/ViewDefinition.java	87.09% <0%> (-0.41%)	11% <0%> (ø)
...y/src/main/java/com/google/cloud/bigquery/Job.java	84.67% <0%> (-0.23%)	32% <0%> (-1%)
...om/google/cloud/bigquery/BigtableColumnFamily.java	95.83% <0%> (-0.17%)	5% <0%> (ø)
...google/cloud/bigquery/StandardTableDefinition.java	93.82% <0%> (-0.08%)	16% <0%> (ø)
...ogle/cloud/bigquery/WriteChannelConfiguration.java	86.05% <0%> (-0.07%)	44% <0%> (ø)
... and 6 more

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