Decresease the amount of allowed cppcheck errors

7 jobs for cpp_check_decrease_warning_count in 110 minutes and 57 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #18337
Apple
Mac-Cpp11

01:04:21

passed #18336
Qt551 VS2013
VS2013-Qt-5.5.1-x64

00:16:50

passed #18335
Qt56 VS2015
VS2015-Qt-5.6.0-x32

00:19:32

passed #18334
Qt56 VS2015
VS2015-Qt-5.6.0-x64

00:25:48

passed #18332
MultiThreads Linux
clang-c++11-Qt5

00:09:02

passed #18333
MultiThreads Linux
cppcheck

00:41:16

passed #18331
Linux
gcc-c++11-Qt5

00:58:18