Migrate db-api to common JS.

src-electron/db/db-api.js

src-electron/db/query-config.js

src-electron/db/query-generic.js

src-electron/db/query-package.js

src-electron/db/query-session.js

src-electron/db/query-zcl.js

src-electron/main-process/electron-main.js

src-electron/rest/admin.js

src-electron/zcl/zcl-loader.js

test/generation.test.js

test/query.test.js

test/sdk-gen.test.js

test/server.test.js

test/validation.test.js

test/zcl-loader.test.js