Sending correct Host header in drivers mode too

[vania-pooh]

related to #1193

[codecov]

Codecov Report

Merging #1244 (8a0f80a) into master (c4b02dc) will decrease coverage by 0.12%.
The diff coverage is 28.57%.

@@            Coverage Diff             @@
##           master    #1244      +/-   ##
==========================================
- Coverage   76.39%   76.27%   -0.13%     
==========================================
  Files          12       12              
  Lines        1436     1437       +1     
==========================================
- Hits         1097     1096       -1     
- Misses        258      260       +2     
  Partials       81       81              

Flag	Coverage Δ
go	76.27% <28.57%> (-0.13%)	⬇️

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Impacted Files	Coverage Δ
service/driver.go	0.00% <0.00%> (ø)
service/service.go	71.11% <ø> (ø)
session/session.go	92.59% <ø> (ø)
selenoid.go	87.12% <20.00%> (-0.38%)	⬇️
service/docker.go	74.20% <100.00%> (ø)

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