Add benchmark format function support

Allows choosing different list and info functions based on the benchmark
version found. Currently only implements "legacy" version 0 with more to
be added.

client-cli/pvc/cli_lib/ceph.py

@@ -1453,6 +1453,17 @@ def ceph_benchmark_list(config, job):
 
 
 def format_list_benchmark(config, benchmark_information):
+    # This matrix is a list of the possible format functions for a benchmark result
+    # It is extensable in the future should newer formats be required.
+    benchmark_matrix = {
+        0: format_list_benchmark_legacy,
+    }
+
+    benchmark_version = benchmark_information['test_format']
+    return benchmark_matrix.get(benchmark_version, lambda: 'Invalid format function')(config, benchmark_information)
+
+
+def format_list_benchmark_legacy(config, benchmark_information):
     benchmark_list_output = []
 
     benchmark_job_length = 20
@@ -1591,6 +1602,17 @@ def format_list_benchmark(config, benchmark_information):
 
 
 def format_info_benchmark(config, benchmark_information):
+    # This matrix is a list of the possible format functions for a benchmark result
+    # It is extensable in the future should newer formats be required.
+    benchmark_matrix = {
+        0: format_info_benchmark_legacy,
+    }
+
+    benchmark_version = benchmark_information['test_format']
+    return benchmark_matrix.get(benchmark_version, lambda: 'Invalid format function')(config, benchmark_information)
+
+
+def format_info_benchmark_legacy(config, benchmark_information):
     if benchmark_information[0]['benchmark_result'] == "Running":
         return "Benchmark test is still running."