ovsdb-idl.at: Test IDL behavior during database conversion. #2006

Job	Run time
osx clang --disable-ssl	3m 2s
linux gcc --disable-ssl	2m 29s
linux clang --disable-ssl	2m 12s
linux gcc c99	2m 0s
linux clang c99	2m 38s
linux gcc test 4.14	7m 37s
linux clang test 4.14 asan	12m 36s
linux gcc test --enable-shared	9m 51s
linux clang test --enable-shared	9m 47s
linux gcc test dpdk	8m 4s
linux clang test dpdk	7m 31s
linux gcc test -ljemalloc	7m 52s
linux clang test -ljemalloc	7m 19s
linux gcc 5.8 5.5 5.4 4.19	6m 3s
linux clang 5.8 5.5 5.4 4.19	5m 36s
linux gcc 4.14 4.9 4.4	3m 33s
linux clang 4.14 4.9 4.4	3m 50s
linux gcc afxdp 5.4	2m 58s
linux clang afxdp 5.4	3m 23s
linux gcc dpdk --enable-shared	3m 33s
linux clang dpdk --enable-shared	2m 54s
linux gcc dpdk-shared	2m 17s
linux clang dpdk-shared	2m 20s
linux gcc dpdk-shared --enable-shared	2m 56s
linux clang dpdk-shared --enable-shared	3m 15s
linux gcc m32 --disable-ssl	2m 7s
linux gcc deb	7m 12s
	2h 14m 55s

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