Move test state to TestInformation#properties.

In odsign_e2e_tests, we store some state in static class members.
jdesprez@ pointed out that this can lead to big issues (see details in
the bug).

This CL solves the problem by moving test state to
TestInformation#properties.

Bug: 215199775
Test: atest odsign_e2e_tests
Change-Id: I2987af4c0dd70ab2670891b3b424811559c5693c
3 files changed