Fixes and enhancements for issues discovered in testing of beta release 1.2.1

[rogerfraser]

Overview

This pull request introduces the following fixes and code enhancements:

Fixes

• Adress a lingering renaming issue in import relating to the renaming of sites in SNX files with discontinuities. Specifically, this fix ensures SNX sites are renamed using the start of the observation window defining the period up to which a discontinuity has been identified, rather than the date of the first SNX solution (which may vary depending on GNSS analyis).
• Address a DynaML station name parsing issue caused when two different station names are provided within the one <DnaStation> record, as shown below.

  <DnaStation>
    <Name>station-name-a</Name>
    <StationCoord>
      <Name>station-name-b</Name>
      ...
    <StationCoord>
  </DnaStation>

Enhancements

• In make_dynadjust_gcc.sh, streamline build behaviour across clone and no-clone options.
• In install_dynadjust_prerequisites.sh, clean up temporary folders created when downloading prerequisites.
• Update (GitHub Actions and Travis) CI/CD scripts to take advantage of changes to make_dynadjust_gcc.sh.

[coveralls]

Coverage decreased (-0.01%) to 82.127% when pulling 47b1baf on rogerfraser:master into 720574b on icsm-au:master.

[codecov]

Codecov Report

Merging #163 (47b1baf) into master (213ed3e) will decrease coverage by 0.01%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #163      +/-   ##
==========================================
- Coverage   82.37%   82.35%   -0.02%     
==========================================
  Files         117      117              
  Lines       32448    32445       -3     
==========================================
- Hits        26729    26721       -8     
- Misses       5719     5724       +5     

Impacted Files	Coverage Δ
dynadjust/dynadjust/dnaimport/dnaparser_pimpl.cxx	84.28% <ø> (-0.03%)	⬇️
dynadjust/include/io/dnaiosnxread.cpp	59.77% <66.66%> (+0.19%)	⬆️
...t/dynadjust/dnaadjustwrapper/dnaadjustprogress.cpp	72.37% <0.00%> (-4.42%)	⬇️
dynadjust/dynadjust/dnaadjust/dnaadjust.cpp	89.17% <0.00%> (+0.01%)	⬆️

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