rename changelog and autoremove testfile to indicate better what is tested

diff --git a/test/integration/test-autoremove b/test/integration/test-apt-get-autoremove
similarity index 100%
rename from test/integration/test-autoremove
rename to test/integration/test-apt-get-autoremove

diff --git a/test/integration/test-changelog b/test/integration/test-apt-get-changelog
similarity index 100%
rename from test/integration/test-changelog
rename to test/integration/test-apt-get-changelog