(core) Moving nbrowser tests to grist-core

Summary:
Moving bulk of nbrowser tests to core. Some tests were split and only part of them were moved.
Tests that are left are either: not suitable for grist-core (like billing) or are failing during browser tests (are not reliable).
Four fixtures directory (uploads, docs, exports-csv/excel) where completely moved to grist-core and are linked as folders.
Those changes allows to add an nbrowser test in grist-core or in the main test folder without any need to link it or link a fixture document.

Other changes:
- testrun.sh has been modified, now it runs tests from both folders (test and core/test),
- TestServer used in grist-core is now adding sample orgs and users (kiwi and others),

Test modified
- SelectionSummary: now it is run on a bigScreen, it was failing randomly
- Billing.ts: relative paths were used
- DateEditor: added waitForServer - it was failing in browser mode
- FrozenColumns, ImportFromGDrive, Printing: updated import paths
- UserManager.ts: was split into two parts (it assumed limited products)
- ViewLayoutResize.ts: this test is still in main repo, it is still failing in browser mode tests

Test Plan: Existing

Reviewers: paulfitz

Reviewed By: paulfitz

Subscribers: dsagal, paulfitz

Differential Revision: https://phab.getgrist.com/D3664

package.json

@@ -12,11 +12,11 @@
     "install:python3": "buildtools/prepare_python3.sh",
     "build:prod": "buildtools/build.sh",
     "start:prod": "sandbox/run.sh",
-    "test": "GRIST_SESSION_COOKIE=grist_test_cookie GRIST_TEST_LOGIN=1 TEST_SUPPORT_API_KEY=api_key_for_support TEST_CLEAN_DATABASE=true NODE_PATH=_build:_build/stubs:_build/ext mocha -g ${GREP_TESTS:-''} _build/test/common/*.js _build/test/client/*.js _build/test/nbrowser/*.js _build/test/server/**/*.js _build/test/gen-server/**/*.js",
-    "test:nbrowser": "GRIST_SESSION_COOKIE=grist_test_cookie GRIST_TEST_LOGIN=1 TEST_SUPPORT_API_KEY=api_key_for_support TEST_CLEAN_DATABASE=true NODE_PATH=_build:_build/stubs:_build/ext mocha -g ${GREP_TESTS:-''} --slow 6000 _build/test/nbrowser/**/*.js",
-    "test:client": "GRIST_SESSION_COOKIE=grist_test_cookie NODE_PATH=_build:_build/stubs:_build/ext mocha _build/test/client/**/*.js",
-    "test:common": "GRIST_SESSION_COOKIE=grist_test_cookie NODE_PATH=_build:_build/stubs:_build/ext mocha _build/test/common/**/*.js",
-    "test:server": "GRIST_SESSION_COOKIE=grist_test_cookie NODE_PATH=_build:_build/stubs:_build/ext mocha _build/test/server/**/*.js _build/test/gen-server/**/*.js",
+    "test": "GRIST_SESSION_COOKIE=grist_test_cookie GRIST_TEST_LOGIN=1 TEST_SUPPORT_API_KEY=api_key_for_support TEST_CLEAN_DATABASE=true NODE_PATH=_build:_build/stubs:_build/ext mocha ${DEBUG:+-b --no-exit} ${DEBUG:---forbid-only} -g ${GREP_TESTS:-''} _build/test/common/*.js _build/test/client/*.js _build/test/nbrowser/*.js _build/test/server/**/*.js _build/test/gen-server/**/*.js",
+    "test:nbrowser": "GRIST_SESSION_COOKIE=grist_test_cookie GRIST_TEST_LOGIN=1 TEST_SUPPORT_API_KEY=api_key_for_support TEST_CLEAN_DATABASE=true NODE_PATH=_build:_build/stubs:_build/ext mocha ${DEBUG:+-b --no-exit} ${DEBUG:---forbid-only} -g ${GREP_TESTS:-''} --slow 8000 _build/test/nbrowser/**/*.js",
+    "test:client": "GRIST_SESSION_COOKIE=grist_test_cookie NODE_PATH=_build:_build/stubs:_build/ext mocha ${DEBUG:+'-b'} _build/test/client/**/*.js",
+    "test:common": "GRIST_SESSION_COOKIE=grist_test_cookie NODE_PATH=_build:_build/stubs:_build/ext mocha ${DEBUG:+'-b'} _build/test/common/**/*.js",
+    "test:server": "GRIST_SESSION_COOKIE=grist_test_cookie NODE_PATH=_build:_build/stubs:_build/ext mocha ${DEBUG:+'-b'} _build/test/server/**/*.js _build/test/gen-server/**/*.js",
     "test:smoke": "NODE_PATH=_build:_build/stubs:_build/ext mocha _build/test/nbrowser/Smoke.js",
     "test:docker": "./test/test_under_docker.sh",
     "test:python": "sandbox_venv3/bin/python sandbox/grist/runtests.py ${GREP_TESTS:+discover -p \"test*${GREP_TESTS}*.py\"}",
@@ -43,6 +43,7 @@
     "@types/express": "4.16.0",
     "@types/form-data": "2.2.1",
     "@types/fs-extra": "5.0.4",
+    "@types/http-proxy": "1.17.9",
     "@types/i18next-fs-backend": "1.1.2",
     "@types/image-size": "0.0.29",
     "@types/js-yaml": "3.11.2",
@@ -74,6 +75,7 @@
     "chai-as-promised": "7.1.1",
     "chance": "1.0.16",
     "esbuild-loader": "2.19.0",
+    "http-proxy": "1.18.1",
     "jsdom": "16.5.0",
     "mocha": "5.2.0",
     "mocha-webdriver": "0.2.9",