Make test-apt-download-progress less flaky

The test is a bit flaky. In order to get it less flaky, reduce
the speed in each run. To compensate for issues, start with a
higher speed level. Also increase the number of runs to 10.

Furthermore, http get the same multiple-run loop, and the log
files are changed to indicate the protocol being tested, as it's
not obvious which one fails if it fails in quiet mode.

Gbp-Dch: ignore

test/integration/test-apt-download-progress

@@ -29,19 +29,24 @@ testsuccess dd if=/dev/zero of=./aptarchive/$TESTFILE bs=800k count=1
 OPT='-o APT::Status-Fd=3 -o Debug::pkgAcquire::Worker=1 -o Debug::Acquire::http=1 -o Debug::Acquire::https=1'
 
 msgtest 'download progress works via' 'http'
-exec 3> apt-progress.log
-testsuccess --nomsg apthelper download-file "http://localhost:${APTHTTPPORT}/$TESTFILE" ./downloaded/http-$TESTFILE $OPT -o Acquire::http::Dl-Limit=600
-assertprogress apt-progress.log
+for i in 1 2 3 4 5 6 7 8 9 10; do
+    exec 3> apt-progress-http.log
+    testsuccess --nomsg apthelper download-file "http://localhost:${APTHTTPPORT}/$TESTFILE" ./downloaded/http-$TESTFILE $OPT -o Acquire::http::Dl-Limit=$((1600/i))
+    if [ "$(wc -l  apt-progress-http.log | awk '{print $1}')" -ge 3 ]; then
+        break
+    fi
+done
+assertprogress apt-progress-http.log
 
 msgtest 'download progress works via' 'https'
-for i in 1 2 3 4 5; do
-    exec 3> apt-progress.log
-    testsuccess --nomsg apthelper download-file "https://localhost:${APTHTTPSPORT}/$TESTFILE" ./downloaded/https-$TESTFILE $OPT -o Acquire::https::Dl-Limit=600
-    if [ "$(wc -l  apt-progress.log | awk '{print $1}')" -ge 3 ]; then
+for i in 1 2 3 4 5 6 7 8 9 10; do
+    exec 3> apt-progress-https.log
+    testsuccess --nomsg apthelper download-file "https://localhost:${APTHTTPSPORT}/$TESTFILE" ./downloaded/https-$TESTFILE $OPT -o Acquire::https::Dl-Limit=$((1600/i))
+    if [ "$(wc -l  apt-progress-https.log | awk '{print $1}')" -ge 3 ]; then
         break
     fi
 done
-assertprogress apt-progress.log
+assertprogress apt-progress-https.log
 
 # cleanup
 rm -f apt-progress*.log