4550049 Reorganize BitcoinTestFramework class (John Newbery)
b7dd44c Add start and stop node methods to BitcoinTestFramework (John Newbery)
b111324 move initialize_chain() and initialize_chain_clean() to be methods of BitcoinTestFramework (John Newbery)
Tree-SHA512: 17e541aea8ca4c0d1189701499384e26239e2d5905de8adb0f042d3cf4c0bbed79fcaad61d563e1743bf4c62ad4915cebb4714783db839d9c53dfbbedcae6e9a