Path shortcuts

[tzaeschke]

Implement path shortcuts and on-path

[codecov]

Codecov Report

Attention: Patch coverage is 90.03984% with 25 lines in your changes missing coverage. Please review.

Files	Patch %	Lines
...rc/main/java/org/scion/jpan/internal/Segments.java	91.37%	12 Missing and 8 partials ⚠️
src/main/java/org/scion/jpan/ScionService.java	50.00%	4 Missing and 1 partial ⚠️

Files	Coverage Δ	Complexity Δ
src/main/java/org/scion/jpan/Constants.java	100.00% <ø> (ø)	1.00 <0.00> (ø)
src/main/java/org/scion/jpan/PathMetadata.java	48.57% <100.00%> (ø)	13.00 <0.00> (ø)
src/main/java/org/scion/jpan/Scmp.java	88.60% <100.00%> (+0.86%)	4.00 <0.00> (ø)
src/main/java/org/scion/jpan/ScmpChannel.java	84.21% <100.00%> (ø)	18.00 <0.00> (ø)
src/main/java/org/scion/jpan/ScionService.java	65.91% <50.00%> (-0.75%)	50.00 <1.00> (ø)
...rc/main/java/org/scion/jpan/internal/Segments.java	85.11% <91.37%> (+2.88%)	99.00 <73.00> (+34.00)

... and 2 files with indirect coverage changes