tests: disable EIPP logging in test-compressed-indexes

The test makes heavy use of disabling compression types which are
usually available some way or another like xz which is how the EIPP
logs are compressed by default. Instead of changing this test to change
the filename according to the compression we want to test we just
disable EIPP logging for this test as that is easier and has the same
practical effect.

Gbp-Dch: Ignore

test/integration/test-compressed-indexes

@@ -92,7 +92,8 @@ Conf testpkg (1.0 unstable [i386])' aptget install testpkg -s -o Debug::pkgAcqui
 " aptcache dumpavail
 }
 
-echo 'Debug::pkgAcquire::worker "true";
+echo 'Dir::Log::Planner "/dev/null";
+Debug::pkgAcquire::worker "true";
 debug::pkgAcquire::Auth "true";
 Debug::pkgAcquire::Diffs "true";
 Debug::Acquire::http "true";' > rootdir/etc/apt/apt.conf.d/99debugconf