refactor(paxos): rearrange code to reflect order of phases (#1487) #891

Job	Run time
pre_job	5s
macos-universal (universal2-apple-darwin)	3m 46s
linux (x86_64-unknown-linux-gnu)	3m 30s
linux-cross (aarch64-unknown-linux-gnu, aarch64)	3m 39s
linux (i686-unknown-linux-gnu)	4m 37s
linux-cross (armv7-unknown-linux-gnueabihf, armv7)	3m 41s
windows (x86_64-pc-windows-msvc, x64)	10m 49s
windows (i686-pc-windows-msvc, x86)	10m 35s
windows (aarch64-pc-windows-msvc, x64)	13m 16s
Release	0s
	53m 58s

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