Revert "QMediaNetworkPlaylistProvider: Upon error parsing, stop parsing."

This reverts commit 0ed18d846c.
The same patch was submitted in both 5.3 and 5.4 branches. It should
have been pushed only to 5.3.

Change-Id: I9e2974886190dfb2e5def5bc325c58f6e7783f55
Reviewed-by: Robin Burchell <robin.burchell@viroteck.net>

tests/auto/unit/qmediaplaylist/testdata/test.pls

@@ -1,27 +0,0 @@
-[playlist]
-
-File1=http://test.host/path
-Title1=First
-Length1=-1
-File2= http://test.host/path  
-Title2=Second
-Length2=-1
-File3=testfile
-Title3=Third
-Length3=-1
-
-
-
-File4=testdir/testfile
-Title4=Fourth
-Length4=-1
-File5=/testdir/testfile
-Title5=Fifth
-Length5=-1
-File6=file://path/name#suffix
-Title6=Sixth
-Length6=-1
-File7=testfile2#suffix
-Title7=Seventh
-Length7=-1
-NumberOfEntries=7

tests/auto/unit/qmediaplaylist/testdata/totem-pl-example.pls

@@ -1,5 +0,0 @@
-[playlist]
-X-GNOME-Title=totem-pl-file-example
-NumberOfEntries=1
-File1=http://test.host/path
-Title1=Silence

tests/auto/unit/qmediaplaylist/testdata/trash.pls

@@ -1,2 +0,0 @@
-[playlist]
-NumberOfEntries=100