Revert "Build with Tycho 2.7.4"

[eparovyshnaya]

Reverts #1113

Passage 250 m1 fails on Jenkins

https://ci.eclipse.org/passage/job/passage-base/1424/console

[ERROR] Plugin org.eclipse.tycho.extras:tycho-pack200a-plugin:2.7.4 or one of its dependencies could not be resolved: org.eclipse.tycho.extras:tycho-pack200a-plugin:jar:2.7.4 was not found in https://repo.eclipse.org/content/repositories/tycho-snapshots/ during a previous attempt. This failure was cached in the local repository and resolution is not reattempted until the update interval of tycho-snapshots has elapsed or updates are forced

Let's try again later (for M2 probably), currently we have no resources for this.

[codecov]

Codecov Report

Merging #1114 (6790408) into master (7599093) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1114      +/-   ##
============================================
- Coverage     33.21%   33.21%   -0.01%     
  Complexity      356      356              
============================================
  Files          1161     1161              
  Lines         25700    25700              
  Branches       1589     1589              
============================================
- Hits           8536     8535       -1     
- Misses        16659    16660       +1     
  Partials        505      505              

Impacted Files	Coverage Δ
...rg/eclipse/passage/lic/bc/BcResidentSecretKey.java	91.30% <0.00%> (-4.35%)	⬇️

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[ruspl-afed]

Pack200 was deprecated as no more supported for modern Java versions and we need to remove it on M2. But for now let's revert the tycho upgrade

[HannesWell]

The removal of tycho-pack200a-plugin indeed happened unintentionally for Tycho 2.7.4.
As suggested in eclipse-tycho/tycho#903 (comment) I can recreated PR #1113 but set the pack200 plug-ins to version 2.7.3. You can then remove them as part of your work to remove pack200 entirely.