Extend test cert validity to 2049
Extend test cert validity to 2049 to make tests pass after 2028
Background: As part of my work on reproducible builds for openSUSE, I check that software still gives identical build results in the future. The usual offset is +15 years, because that is how long I expect some software will be used in some places. This showed failing tests in our package build.
See https://reproducible-builds.org/ for why this matters.
Note: I tested that i586 builds still pass tests on 2036-12-01 so this change introduces no year2038 problem.
There is an existing test failing in 2037 because of a year 2038 issue (a timestamp now+365d that does not fit into long)