Fix http_client template

[HashWarlock]

Description

Fix the local testnet contract test function. Currently the phala contract test function fails to connect to the local testnet and there is an import dependency error on the mocha package.

Another bug involves the http_client template. The tests folder is missing causing the copy template to fail. Renaming the test to tests resolves the error.

Target

• [x] Rename http_client test folder to tests
• [x] Fix mocha import error
• [x] Fix local testnet connection error
• [x] Update new release