solverKey -> solveKey, fix #599

[dehann]

fix #599

[codecov]

Codecov Report

Merging #602 into master will increase coverage by 6.34%.
The diff coverage is 86.53%.

@@            Coverage Diff             @@
##           master     #602      +/-   ##
==========================================
+ Coverage   73.55%   79.90%   +6.34%     
==========================================
  Files          33       33              
  Lines        2186     2190       +4     
==========================================
+ Hits         1608     1750     +142     
+ Misses        578      440     -138     

Impacted Files	Coverage Δ
src/Deprecated.jl	0.00% <ø> (ø)
src/services/Serialization.jl	71.83% <ø> (ø)
src/CloudGraphsDFG/services/CloudGraphsDFG.jl	70.43% <81.25%> (+2.57%)	⬆️
src/services/DFGVariable.jl	88.35% <84.61%> (+7.53%)	⬆️
src/CloudGraphsDFG/services/CommonFunctions.jl	83.52% <100.00%> (ø)
src/entities/DFGVariable.jl	80.00% <100.00%> (+5.00%)	⬆️
src/LightDFG/FactorGraphs/BiMaps.jl	86.66% <0.00%> (+0.45%)	⬆️
src/entities/DFGFactor.jl	81.48% <0.00%> (+0.71%)	⬆️
src/services/AbstractDFG.jl	85.62% <0.00%> (+1.25%)	⬆️
... and 5 more

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[Affie]

Looks good to me