Fix usage of frequency when sending

[sidey79]

• Please check if the PR fulfills these requirements
• [x] Tests for the changes have been added / modified (needed for for bug fixes / features)
• [ ] commandref has been added / updated (needed for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
• [x] Bugfix (please link issue)
• [ ] Feature enhancement
• [ ] Documentation update
• [x] Unittest enhancement
• [ ] other

https://forum.fhem.de/index.php?topic=58396.new;topicseen#new

• What is the current behavior? (You can also link to an open issue here, if this describes the current behavior)

SIGNALduino_Set_sendMsg

• If the protocol doesn't has a default frequency set but one is provided via parameter, then the freqency will not be set on the uC during wrong used schema.

• If the protocol has a default frequency set and one is provided via parameters, then the frequency from the protocol was used instead of the given one.

• What is the new behavior (if this is a feature change)?

• If the protocol doesn't has a default frequency set but one is provided via parameter, then the freqency will be set within the uC (correct schema is used)

• If the protocol has a default frequency set and one is provided via parameters, then the frequency from the parameters are prefered.

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

Maybe if someone has wrong freqency settings in the sendCmd, this will break functionality

• Other information:

[codecov[bot]]

Codecov Report

Merging #1150 (f641dcf) into master (89ead26) will increase coverage by 0.15%. The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master    #1150      +/-   ##
==========================================
+ Coverage   67.04%   67.20%   +0.15%     
==========================================
  Files         132      134       +2     
  Lines        9811     9833      +22     
  Branches     1577     1577              
==========================================
+ Hits         6578     6608      +30     
+ Misses       1937     1929       -8     
  Partials     1296     1296              

Flag	Coverage Δ
fhem	56.78% <66.66%> (+0.20%)	:arrow_up:
modules	67.20% <66.66%> (+0.15%)	:arrow_up:
perl	90.33% <ø> (ø)
unittests	67.20% <66.66%> (+0.15%)	:arrow_up:

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Impacted Files	Coverage Δ
t/FHEM/00_SIGNALduino/01_SIGNALduino_Set_sendMsg.t	100.00% <ø> (ø)
FHEM/00_SIGNALduino.pm	64.09% <66.66%> (+0.44%)	:arrow_up:
t/FHEM/14_FLAMINGO/09_parseData.t	94.11% <0.00%> (ø)
t/FHEM/14_BresserTemeo/00_load.t	100.00% <0.00%> (ø)

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