Fix unittest error in actions and failing SIGNALduino_CheckVersionResp test

[sidey79]

• Please check if the PR fulfills these requirements

• Tests for the changes have been added / modified (needed for for bug fixes / features)
• commandref has been added / updated (needed for bug fixes / features)
• CHANGED has been updated (needed for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Bugfix

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

SIGNALduino_CheckVersionResp does always apply variable $1 to $hash->{version} even if the regex doen't find any version.
Then it uses the last value which is stored in $1.

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

$hash->{version} does only receive an variable assignent if the regex for searching a version number has a match

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

no

• Other information:

Fixed also the error report in the classic unittests

[codecov]

Codecov Report

Merging #923 (e9fb6f2) into master (86f7898) will increase coverage by 2.26%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #923      +/-   ##
==========================================
+ Coverage   53.72%   55.98%   +2.26%     
==========================================
  Files          54       66      +12     
  Lines        5279     8050    +2771     
  Branches      743     1291     +548     
==========================================
+ Hits         2836     4507    +1671     
- Misses       2054     2709     +655     
- Partials      389      834     +445     

Flag	Coverage Δ
fhem	91.37% <ø> (ø)
modules	91.37% <ø> (ø)
perl	91.37% <ø> (ø)
unittest	55.98% <66.66%> (+2.26%)	⬆️
unittests	91.37% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
FHEM/00_SIGNALduino.pm	61.19% <66.66%> (+34.61%)	⬆️
FHEM/14_Hideki.pm	4.67% <0.00%> (ø)
FHEM/14_BresserTemeo.pm	9.56% <0.00%> (ø)
FHEM/10_SD_GT.pm	5.99% <0.00%> (ø)
FHEM/14_SD_WS09.pm	59.51% <0.00%> (ø)
FHEM/14_SD_WS07.pm	52.59% <0.00%> (ø)
FHEM/90_SIGNALduino_un.pm	9.45% <0.00%> (ø)
FHEM/14_SD_AS.pm	8.00% <0.00%> (ø)
FHEM/14_FLAMINGO.pm	48.30% <0.00%> (ø)
FHEM/14_SD_RSL.pm	39.13% <0.00%> (ø)
... and 6 more

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[sidey79]

Shoud fix failing unittests in #918