fixed exception when String.format thought the binary data has formt placeholders

[flocsy]

No description provided.

[tananaev]

Please include unit test.

[flocsy]

the existing unittest covers it, that's why the 1st commit failed

[tananaev]

What is the difference then?

[flocsy]

in org/traccar/StringProtocolEncoder.java:30 it might fail depending on the binary data that was concatenated to the format string. It happens in my case sometimes... But it's easy to see that it's not meant to have binary data in the format string

[tananaev]

Well, can we have test case for the different behavior?

[flocsy]

Added a test. It passes with:

return formatCommand(channel, command, "TK,%s", getBinaryData(command));

but fails with the old:

return formatCommand(channel, command, "TK," + getBinaryData(command));

[tananaev]

Merged, thanks.