[OE-core] [PATCH 13/14] testimage.bbclass: move codes into testimage_main

testimage-auto is expected to run testimage task's codes automatically. But in fact, it's currently missing some codes, including testimage_sanity and create_rpm_index. This leads to the problem of unexpected runtime failure of test_dnf_makecache. The error message is as below. RESULTS - dnf.Dn

[OE-core] [PATCH 13/14] testimage.bbclass: move codes into testimage_main

testimage-auto is expected to run testimage task's codes automatically. But in fact, it's currently missing some codes, including testimage_sanity and create_rpm_index. This leads to the problem of unexpected runtime failure of test_dnf_makecache. The error message is as below. RESULTS - dnf.Dn