samples: update table expiration

[stephaniewang526]

Fixes b/149386965

[codecov]

Codecov Report

Merging #166 into master will not change coverage by %.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #166   +/-   ##
=========================================
  Coverage     77.44%   77.44%           
  Complexity     1110     1110           
=========================================
  Files            73       73           
  Lines          5932     5932           
  Branches        645      645           
=========================================
  Hits           4594     4594           
  Misses         1013     1013           
  Partials        325      325           

Impacted Files	Coverage Δ	Complexity Δ
...com/google/cloud/bigquery/StandardSQLDataType.java	75.00% <0.00%> (ø)	7.00% <0.00%> (ø%)	⬆️
...m/google/cloud/bigquery/StandardSQLStructType.java	85.71% <0.00%> (ø)	5.00% <0.00%> (ø%)	⬆️
...ava/com/google/cloud/bigquery/RoutineArgument.java	86.36% <0.00%> (ø)	5.00% <0.00%> (ø%)	⬆️
...google/cloud/bigquery/ExternalTableDefinition.java	56.84% <0.00%> (ø)	16.00% <0.00%> (ø%)	⬆️
...va/com/google/cloud/bigquery/StandardSQLField.java	90.90% <0.00%> (ø)	7.00% <0.00%> (ø%)	⬆️
...java/com/google/cloud/bigquery/ViewDefinition.java	87.50% <0.00%> (ø)	11.00% <0.00%> (ø%)	⬆️
...y/src/main/java/com/google/cloud/bigquery/Job.java	84.89% <0.00%> (ø)	33.00% <0.00%> (ø%)	⬆️
...om/google/cloud/bigquery/BigtableColumnFamily.java	96.00% <0.00%> (ø)	5.00% <0.00%> (ø%)	⬆️
...google/cloud/bigquery/StandardTableDefinition.java	93.90% <0.00%> (ø)	16.00% <0.00%> (ø%)	⬆️
...ogle/cloud/bigquery/WriteChannelConfiguration.java	86.12% <0.00%> (ø)	44.00% <0.00%> (ø%)	⬆️
... and 6 more

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