JunOS: fix parsing range of from-color, then-tag, from-tag, then-color

[dhalperi]

This is for #6335

Note that there does not appear to be a from color2. Add warnings where appropriate.

[batfish-bot]

This change is 

[codecov]

Codecov Report

Merging #6645 (8280331) into master (d3b6cdf) will increase coverage by 0.00%.
The diff coverage is 87.50%.

@@            Coverage Diff            @@
##             master    #6645   +/-   ##
=========================================
  Coverage     73.46%   73.46%           
- Complexity    36473    36487   +14     
=========================================
  Files          2917     2918    +1     
  Lines        146887   146920   +33     
  Branches      17710    17716    +6     
=========================================
+ Hits         107908   107936   +28     
+ Misses        30476    30475    -1     
- Partials       8503     8509    +6     

Impacted Files	Coverage Δ	Complexity Δ
...va/org/batfish/representation/juniper/PsFroms.java	92.77% <ø> (+3.61%)	34.00 <0.00> (+1.00)
...fish/datamodel/routing_policy/expr/MatchColor.java	28.57% <33.33%> (ø)	2.00 <1.00> (ø)
.../org/batfish/representation/juniper/PsThenTag.java	76.92% <76.92%> (ø)	6.00 <6.00> (?)
...fish/grammar/flatjuniper/ConfigurationBuilder.java	72.66% <100.00%> (+0.13%)	876.00 <5.00> (+4.00)
...rg/batfish/representation/juniper/PsFromColor.java	83.33% <100.00%> (+83.33%)	6.00 <6.00> (+6.00)
.../org/batfish/representation/juniper/PsFromTag.java	91.66% <100.00%> (+11.66%)	7.00 <6.00> (+5.00)
.../org/batfish/dataplane/rib/RouteAdvertisement.java	83.67% <0.00%> (-4.09%)	18.00% <0.00%> (-1.00%)
...ain/java/org/batfish/symbolic/IngressLocation.java	65.78% <0.00%> (-2.64%)	15.00% <0.00%> (-1.00%)
...col/src/main/java/org/batfish/role/InferRoles.java	89.09% <0.00%> (-1.82%)	49.00% <0.00%> (-2.00%)
...main/java/org/batfish/datamodel/acl/AclTracer.java	62.89% <0.00%> (-1.26%)	43.00% <0.00%> (-1.00%)
... and 3 more

[corinaminer]

Reviewed 14 of 14 files at r1.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @arifogel)