improve stream testing script (#2549)

* merge testContent.sh into ocContent.sh

* detect ffmpeg

ffmpeg or ffmpeg.exe in path, current dir, or parent dir

* use ocTestStream in api test

* enable verbose logging for api tests

* log ffmpeg version

* change ffmpeg lookup order

* set path properly for using the local ffmpeg

* rm double space from transcoder error logs

* update tests for new video stream

do not test bitrate

* set test stream target to 127.0.0.1

* log ffmpeg path

* update ffmpeg to v4.4.1

* improve logs

* fix ffmpeg installer script

* fix api test runner

* fix logs

* install fonts

* cleanup

* use ocTestStream.sh for all automated tests

* cleanup ocTestStream.sh

* cleanup test/automated/hls/run.sh

* Fix misspell

* fix ffmpeg installer in automated test runners

* spell fix

* cleanup script

* rev quick api tests

* cleanup tmp paths properly in automated tests

* rm unused ffmpeg package

* cleanup

* fix s3 test

* cache ffmpeg bin for automated tests

* shellcheck allow source

* rm missplaced file if backup fails

* use ffmpeg full path

* set lookup path for shellcheck

test/automated/tools.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+ffmpegInstall(){
+    # install a specific version of ffmpeg
+
+    FFMPEG_VER="4.4.1"
+    FFMPEG_PATH="$(pwd)/ffmpeg-$FFMPEG_VER"
+
+    if ! [[ -d "$FFMPEG_PATH" ]]; then
+        mkdir "$FFMPEG_PATH"
+    fi
+
+    pushd "$FFMPEG_PATH" >/dev/null || exit
+
+    if [[ -x "$FFMPEG_PATH/ffmpeg" ]]; then
+    
+        ffmpeg_version=$("$FFMPEG_PATH/ffmpeg" -version | awk -F 'ffmpeg version' '{print $2}' | awk 'NR==1{print $1}')
+
+        if [[ "$ffmpeg_version" == "$FFMPEG_VER-static" ]]; then
+            return 0
+        else
+            mv "$FFMPEG_PATH/ffmpeg" "$FFMPEG_PATH/ffmpeg.bk" || rm -f "$FFMPEG_PATH/ffmpeg"
+        fi
+    fi
+
+    rm -f ffmpeg.zip
+    curl -sL --fail https://github.com/ffbinaries/ffbinaries-prebuilt/releases/download/v${FFMPEG_VER}/ffmpeg-${FFMPEG_VER}-linux-64.zip --output ffmpeg.zip >/dev/null
+    unzip -o ffmpeg.zip >/dev/null && rm -f ffmpeg.zip
+    chmod +x ffmpeg
+    PATH=$FFMPEG_PATH:$PATH
+
+    popd >/dev/null || exit
+}