fixed an issue with --key-pattern (redis#318)

* fixed an issue with --key-pattern P, when it should be --key-pattern P:P when --ratio is also present

* fixing issue with using --key-pattern when we should be using --command-key-pattern

* fixing --key-pattern vs. --command-key-pattern issue in memtier_benchmark-1Mkeys-string-mixed-50-50-set-get-100B-expire

Author: slice4e

redis_benchmarks_specification/test-suites/memtier_benchmark-1Mkeys-10B-psetex-expire-use-case.yml

@@ -12,7 +12,7 @@ dbconfig:
     run_image: redislabs/memtier_benchmark:edge
     tool: memtier_benchmark
     arguments: '"--data-size" "10" --ratio 1:0 "--key-pattern"
-      "P" "-c" "50" "-t" "2" "--hide-histogram" "--key-minimum" "1"  "--key-maximum"
+      "P:P" "-c" "50" "-t" "2" "--hide-histogram" "--key-minimum" "1"  "--key-maximum"
       "1000000" "-n" "allkeys"'
   resources:
     requests:

redis_benchmarks_specification/test-suites/memtier_benchmark-1Mkeys-10B-setex-expire-use-case.yml

@@ -12,7 +12,7 @@ dbconfig:
     run_image: redislabs/memtier_benchmark:edge
     tool: memtier_benchmark
     arguments: '"--data-size" "10" --ratio 1:0 "--key-pattern"
-      "P" "-c" "50" "-t" "2" "--hide-histogram" "--key-minimum" "1"  "--key-maximum"
+      "P:P" "-c" "50" "-t" "2" "--hide-histogram" "--key-minimum" "1"  "--key-maximum"
       "1000000" "-n" "allkeys"'
   resources:
     requests:

redis_benchmarks_specification/test-suites/memtier_benchmark-1Mkeys-string-mixed-50-50-set-get-100B-expire-pipeline-10.yml

@@ -36,7 +36,7 @@ clientconfig:
   run_image: redislabs/memtier_benchmark:edge
   tool: memtier_benchmark
   arguments: '"--data-size" "100" --distinct-client-seed --command "SET __key__ __data__
-    EX 10" --command "GET __key__" --key-pattern R:R --key-minimum=1 --key-maximum
+    EX 10" --command "GET __key__" --command-key-pattern R --key-minimum=1 --key-maximum
     1000000 --test-time 180 -c 25 -t 4 --hide-histogram --pipeline 10'
   resources:
     requests:

redis_benchmarks_specification/test-suites/memtier_benchmark-1Mkeys-string-mixed-50-50-set-get-100B-expire.yml

@@ -36,7 +36,7 @@ clientconfig:
   run_image: redislabs/memtier_benchmark:edge
   tool: memtier_benchmark
   arguments: '"--data-size" "100" --distinct-client-seed --command "SET __key__ __data__
-    EX 10" --command "GET __key__" --key-pattern R:R --key-minimum=1 --key-maximum
+    EX 10" --command "GET __key__" --command-key-pattern R --key-minimum=1 --key-maximum
     1000000 --test-time 180 -c 25 -t 4 --hide-histogram'
   resources:
     requests: