The SDk build fails

[jantje]

As reported in #1611

when running mvn clean verify -PSDK,win64,latest -DskipTests=true the build fails with the error

[ERROR] Cannot resolve project dependencies:
[ERROR]   Software being installed: io.sloeber.product 4.4.2.qualifier
[ERROR]   Missing requirement: io.sloeber.product 4.4.2.qualifier requires 'org.eclipse.equinox.p2.iu; org.eclipse.mylyn_feature.feature.group 0.0.0' but it could not be found
[ERROR]
[ERROR] See https://wiki.eclipse.org/Tycho/Dependency_Resolution_Troubleshooting for help.
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] io.sloeber.parent 4.4.2-SNAPSHOT ................... SUCCESS [  0.202 s]
[INFO] io.sloeber.core 4.4.2-SNAPSHOT ..................... SUCCESS [  7.964 s]
[INFO] io.sloeber.core.nl1 4.4.2-SNAPSHOT ................. SUCCESS [  0.433 s]
[INFO] io.sloeber.ui 4.4.2-SNAPSHOT ....................... SUCCESS [  1.655 s]
[INFO] io.sloeber.ui.nl1 4.4.2-SNAPSHOT ................... SUCCESS [  0.452 s]
[INFO] io.sloeber.feature 4.4.2-SNAPSHOT .................. SUCCESS [  0.331 s]
[INFO] io.sloeber.product.sdk 4.4.2-SNAPSHOT .............. FAILURE [  0.390 s]
[INFO] io.sloeber.tests 4.4.2-SNAPSHOT .................... SKIPPED
[INFO] root 2.2.0 ......................................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------