Fix decoding of truncated messages containing variable length arrays [AP-948] #1378

Job	Run time
Bazel	2m 53s
macOS	15m 38s
Ubuntu 18.04 (Build: Debug, Compilers: gcc-6/g++-6, Shared Library: true)	6m 31s
Ubuntu 18.04 (Build: Debug, Compilers: clang-6.0/clang++-6.0, Shared Library: true)	6m 34s
Windows 2019 (Generator: MinGW Makefiles, Shared Library: true)	11m 24s
Ubuntu 18.04 (Build: Debug, Compilers: clang-6.0/clang++-6.0, Shared Library: false)	6m 44s
Ubuntu 18.04 (Build: Release, Compilers: gcc-6/g++-6, Shared Library: true)	8m 22s
Windows 2019 (Generator: MinGW Makefiles, Shared Library: false)	10m 58s
Ubuntu 18.04 (Build: Release, Compilers: gcc-6/g++-6, Shared Library: false)	8m 31s
Windows 2019 (Generator: Visual Studio 16 2019, Shared Library: true)	5m 33s
Ubuntu 18.04 (Build: Release, Compilers: clang-6.0/clang++-6.0, Shared Library: true)	8m 7s
Windows 2019 (Generator: Visual Studio 16 2019, Shared Library: false)	5m 26s
Ubuntu 18.04 (Build: Release, Compilers: clang-6.0/clang++-6.0, Shared Library: false)	8m 4s
Test Big Endian	4m 30s
	1h 49m 15s

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