Adjust parsing of filter strings

[sarahd93]

Parsing filter strings that include substrings in double quotes is causing issues. Adjust parsing functions to be able to handle double quotes.

Checklist:

• Tests
• CHANGELOG Entry

[codecov]

Codecov Report

Merging #2051 into gsa-9.0 will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           gsa-9.0    #2051      +/-   ##
===========================================
+ Coverage    50.24%   50.26%   +0.01%     
===========================================
  Files         1070     1070              
  Lines        25141    25149       +8     
  Branches      7133     7108      -25     
===========================================
+ Hits         12633    12641       +8     
  Misses       11366    11366              
  Partials      1142     1142              

Impacted Files	Coverage Δ
gsa/src/gmp/models/filter.js	100.00% <100.00%> (ø)
gsa/src/gmp/models/filter/filterterm.js	100.00% <100.00%> (ø)

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[bjoernricks]

Nice! I would have written this code differently. Could you add some tests for the
foo="lorem ipsum" test case. Just test parsing of combinations like ~"foo bar", foo="lorem ipsum" etc.

Btw. I think "foo bar"=def will be parsed to at the moment. Not sure if we want to avoid that.

[sarahd93]

I already started writing tests :)

You are right about "foo bar"=def, I am going to check again if I can catch some more of those edge cases.