increase the default probe to 60s #126

Job	Run time
osx clang --disable-ssl	46s
dpdk gcc	1m 30s
linux deb no dpdk	4m 41s
linux rpm fedora	4m 30s
clang-analyze	3m 14s
linux gcc --disable-ssl	1m 22s
linux clang --disable-ssl	1m 33s
linux gcc c99	1m 37s
linux clang c99	1m 44s
linux gcc test	1m 59s
linux clang address,undefined test	2m 47s
linux gcc test --enable-shared	2m 26s
linux clang test --enable-shared	2m 12s
linux gcc check check-dpdk dpdk	1m 26s
linux clang check check-dpdk dpdk	1m 39s
linux gcc test -ljemalloc	1m 51s
linux clang test -ljemalloc	2m 0s
linux gcc --enable-afxdp	1m 25s
linux clang --enable-afxdp	1m 29s
linux gcc dpdk --enable-shared	2m 20s
linux clang dpdk --enable-shared	2m 21s
linux gcc dpdk-shared	1m 52s
linux clang dpdk-shared	1m 29s
linux gcc dpdk-shared --enable-shared	1m 47s
linux clang dpdk-shared --enable-shared	2m 7s
linux gcc m32 --disable-ssl	1m 36s
linux gcc check-ovsdb-cluster	1m 42s
linux gcc check-kernel -100	1m 47s
linux gcc check-kernel 100-	1m 23s
linux clang address,undefined check-kernel -100	1m 53s
linux clang address,undefined check-kernel 100-	2m 9s
linux gcc check-offloads -100	1m 27s
linux gcc check-offloads 100-	2m 21s
linux gcc dpdk check-system-userspace	1m 36s
linux clang address,undefined dpdk check-system-userspace	1m 57s
linux gcc dpdk check-system-tso	1m 47s
linux gcc dpdk check-afxdp	1m 33s
	1h 13m 18s

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