Validate user input when it is entered

[AlexandrouR]

Validates the user input as it is passed instead of validating it at the end of setup.

[codecov]

Codecov Report

Merging #13 into master will decrease coverage by 2.81%.
The diff coverage is 77.77%.

@@             Coverage Diff              @@
##             master      #13      +/-   ##
============================================
- Coverage     47.13%   44.32%   -2.82%     
+ Complexity       83       82       -1     
============================================
  Files            21       21              
  Lines           664      670       +6     
  Branches         45       47       +2     
============================================
- Hits            313      297      -16     
- Misses          331      352      +21     
- Partials         20       21       +1

Impacted Files	Coverage Δ	Complexity Δ
...java/org/web3j/console/project/ProjectCreator.java	15.55% <ø> (-20%)	2 <0> (-1)
.../org/web3j/console/project/InteractiveOptions.java	86.36% <77.77%> (-7.39%)	8 <2> (+1)
...ava/org/web3j/console/project/ProjectImporter.java	20% <0%> (-31.43%)	2% <0%> (-1%)

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