fix(vm): make initAllow setters drop leftover local snapshot

[vividctrlalt]

What

VMConfig.initAllow*(), initDynamicEnergy*(), and initDisableJavaLangMath() write globalSnapshot while getters read current() (the thread-local snapshot if one is present). After tronprotocol#6857, a leftover local snapshot from a prior constant call hides those writes, so callers of init* do not observe the flags they just set.

Why

tronprotocol#6857 split VM config into a process-global snapshot (block processing) and a thread-local snapshot (constant calls). That dual-write is the correct production isolation: current() must keep preferring the local view so a solidity/PBFT constant call cannot pollute HEAD flags.

The test-only init* API (25 test files; production load uses setGlobalSnapshot) was left as "write global, read local". That is a contract bug in the setters themselves. Patching call sites — clearLocalSnapshot() wrappers around init*, clearing the local view from ConfigLoader when disable is set, or BaseTest @After cleanup — treats the symptom and misses any test that still calls plain init*. The one-place fix is: every init* setter that mutates globalSnapshot first drops the leftover local snapshot, then writes the global one. current() is unchanged.

Changes

• Private forInit() removes the thread-local snapshot and returns globalSnapshot. Every initAllow* / initDynamicEnergy* / initDisableJavaLangMath setter is a single assignment through that helper.
• VMConfigIsolationTest.testInitIsVisibleWhenLocalSnapshotExists asserts that initAllowTvmLondon(1) is visible even when a stale local snapshot exists. @After still restores the global snapshot.
• TransactionsMsgHandlerTest: every case that stubs a peer uses a brand-new mock and doReturn. A shared mock plus when(mock.foo()) races handleTransaction calling isBadPeer() on the same mock. Boolean mocks default to false, so an isBadPeer() stub is not added.

Related

tronprotocol#6857

Test plan

• ./gradlew :framework:test --tests org.tron.common.runtime.vm.VMConfigIsolationTest --tests org.tron.core.net.messagehandler.TransactionsMsgHandlerTest --tests org.tron.common.runtime.vm.AllowTvmLondonTest --tests org.tron.common.runtime.vm.ValidateMultiSignContractTest