[BigQueryWorkloadTester] Adding Workload Runners and their respective tests

[ldanielmadariaga]

[BigQueryWorkloadTester] Adding Workload Runners and their respective tests

[codecov[bot]]

Codecov Report

Merging #192 into dev will increase coverage by 46.14%. The diff coverage is 93.73%.

@@              Coverage Diff              @@
##                dev     #192       +/-   ##
=============================================
+ Coverage     37.78%   83.93%   +46.14%     
- Complexity       42      149      +107     
=============================================
  Files            19       26        +7     
  Lines           389      772      +383     
  Branches         12       47       +35     
=============================================
+ Hits            147      648      +501     
+ Misses          240      116      -124     
- Partials          2        8        +6

Impacted Files	Coverage Δ	Complexity Δ
...hmark/runners/ConcurrentWorkloadRunnerFactory.java	0% <0%> (ø)	0 <0> (?)
...enchmark/runners/ConcurrentWorkloadRunnerTest.java	100% <100%> (ø)	25 <25> (?)
...mark/runners/callables/WorkloadRunnerCallable.java	100% <100%> (ø)	3 <3> (?)
.../runners/callables/WorkloadRunnerCallableTest.java	100% <100%> (ø)	4 <4> (?)
...ontem/benchmark/runners/SerialQueryRunnerTest.java	100% <100%> (ø)	18 <18> (?)
...em/benchmark/runners/ConcurrentWorkloadRunner.java	95.45% <95.45%> (ø)	8 <8> (?)
...ud/pontem/benchmark/runners/SerialQueryRunner.java	97.82% <97.82%> (ø)	7 <7> (?)
... and 11 more