fix the remaining lzma calls with xz --format=lzma in the testcases

test/integration/test-hashsum-verification

@@ -23,7 +23,7 @@ prepare() {
 	find aptarchive -name 'Release' -delete
 	cat aptarchive/Packages | gzip > aptarchive/Packages.gz
 	cat aptarchive/Packages | bzip2 > aptarchive/Packages.bz2
-	cat aptarchive/Packages | lzma > aptarchive/Packages.lzma
+	cat aptarchive/Packages | xz --format=lzma > aptarchive/Packages.lzma
         # create Release file with incorret checksums
 	cat > aptarchive/Release <<EOF
 Date: Fri, 05 Aug 2011 09:22:08 UTC

test/integration/test-pdiff-usage

@@ -21,7 +21,7 @@ testequal "$(cat ${PKGFILE})
 cp ${PKGFILE}-new aptarchive/Packages
 cat aptarchive/Packages | gzip > aptarchive/Packages.gz
 cat aptarchive/Packages | bzip2 > aptarchive/Packages.bz2
-cat aptarchive/Packages | lzma > aptarchive/Packages.lzma
+cat aptarchive/Packages | xz --format=lzma > aptarchive/Packages.lzma
 rm -rf aptarchive/Packages.diff
 mkdir -p aptarchive/Packages.diff
 PATCHFILE="aptarchive/Packages.diff/$(date +%Y-%m-%d-%H%M.%S)"

test/integration/test-releasefile-verification

@@ -24,7 +24,7 @@ prepare() {
 	find aptarchive -name 'Release' -delete
 	cat aptarchive/Packages | gzip > aptarchive/Packages.gz
 	cat aptarchive/Packages | bzip2 > aptarchive/Packages.bz2
-	cat aptarchive/Packages | lzma > aptarchive/Packages.lzma
+	cat aptarchive/Packages | xz --format=lzma > aptarchive/Packages.lzma
 	generatereleasefiles "$DATE"
 }