tests: TestSync and TestTimeout fail

Running the tests locally fails.
I'm not sure why at this point.

```
--- FAIL: TestSync (2.15s)
netsender_test.go:353: ns.Vars failed with error datastore: no such entity
netsender_test.go:359: Expected "Normal" for vars["mode"], got ""
netsender_test.go:353: ns.Vars failed with error datastore: no such entity
netsender_test.go:359: Expected "Paused" for vars["mode"], got ""
netsender_test.go:365: Expected "TestError" for vars["error"], got ""
netsender_test.go:353: ns.Vars failed with error datastore: no such entity
netsender_test.go:359: Expected "Normal" for vars["mode"], got ""
--- FAIL: TestTimeout (0.51s)
netsender_test.go:312: ns.Vars failed failed with error datastore: no such entity
FAIL
FAIL github.com/ausocean/client/pi/netsender 7.684s
```

Start by running the failing TestSync and TestTimeout cases in netsender_test.go, especially the checks around lines 312 and 353-365. Trace the reported datastore: no such entity error and determine why the expected variables are missing; done means both tests pass with the expected mode and error values.

Written by the indexing model from the issue text.