Epic: none
Release note: none

Epic: none
Release note: none

Before this commit, the test was a no-op reporting 0 metrics. This is
due to isOurCommand function which assumed that the key increment
request is always the first request in BatchRequest. With pipelined
writes, this is not true.

A typical request is:
  QueryIntent ["00001-testing",/Min), Increment ["00001-testing",/Min)

In this commit, isOutCommand scans the BatchRequest to find the command.

Before:
```
observed 0 async write restarts, observed 0/0 injected aborts, 0 injected illegal lease applied indexes
commands reproposed (unchanged): 1
commands reproposed (new LAI): 0
```
After:
```
observed 69 async write restarts, observed 0/69 injected aborts, 366 injected illegal lease applied indexes
commands reproposed (unchanged): 1
commands reproposed (new LAI): 297
```

Epic: none
Release note: none

Epic: none
Release note: none