ovsdb-idl.at: Test IDL behavior during database conversion. #2004

Job	Run time
dpdk gcc	6s
osx clang --disable-ssl	4m 49s
linux deb no dpdk	4m 33s
linux gcc --disable-ssl	2m 27s
linux clang --disable-ssl	2m 7s
linux gcc c99	2m 9s
linux clang c99	2m 10s
linux gcc test	7m 16s
linux clang test asan	13m 9s
linux clang test ubsan	8m 53s
linux gcc test --enable-shared	10m 2s
linux clang test --enable-shared	10m 8s
linux gcc test dpdk	8m 39s
linux clang test dpdk	7m 30s
linux gcc test -ljemalloc	7m 49s
linux clang test -ljemalloc	7m 51s
linux gcc --enable-afxdp	2m 24s
linux clang --enable-afxdp	2m 13s
linux gcc dpdk --enable-shared	2m 55s
linux clang dpdk --enable-shared	2m 58s
linux gcc dpdk-shared	2m 25s
linux clang dpdk-shared	2m 31s
linux gcc dpdk-shared --enable-shared	3m 34s
linux clang dpdk-shared --enable-shared	3m 16s
linux gcc m32 --disable-ssl	2m 2s
	2h 3m 56s

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