Testnet - v1.6.1

This is a Testnet release. It is not recommended for Mainnet Beta

Changes

• cargo bpf-test now supports the --no-run flag
• solana confirm -v shows access modes of accounts by decoding MessageHeader of transactions.
• solana catchup displays more precise ETA by computing overall average progress (contributed by @diman-io)
• solana epoch-info now estimates epoch elapsed/remaining time based on the number of slots in the last hour's worth of performance samples from the cluster
• RPC: SPL Token balance changes from inner instructions are now included in {pre,post}TokenBalances
• PoH can drift behind the target wallclock duration, allowing BankingStage to process too many transactions in a slot. Add wallclock throttling to BankingStage to compensate
• Adjust compute budget units to account for the amount of data passed to an inner instruction
• Incomplete snapshot downloads are now cleaned up
• solana-validator --snapshots DIR argument can be used to select where snapshots are generated (contributed by @diman-io)
• solana-test-validator now supports the --slots-per-epoch argument, prints a message when genesis-specific arguments are ignored

Updating to solana-program-test v1.6

See https://github.com/solana-labs/solana/wiki/Migrating-Rust-programs-from-v1.5-to-v1.6 for information on how to upgrade a Rust program from v1.5 to v1.6