Remove non-inclusive language from tests

[flands]

Is your feature request related to a problem? Please describe.

Non-inclusive language can be found in some tests

$ > git grep -Ei '(master|slave)' | grep -Evi '(tree|blob)/master' | grep test
packages/opentelemetry-plugin-fetch/test/fetch.test.ts:function createMasterResource(resource = {}): PerformanceResourceTiming {
packages/opentelemetry-plugin-fetch/test/fetch.test.ts:  const masterResource: any = createResource(resource);
packages/opentelemetry-plugin-fetch/test/fetch.test.ts:  Object.keys(masterResource).forEach((key: string) => {
packages/opentelemetry-plugin-fetch/test/fetch.test.ts:    if (typeof masterResource[key] === 'number') {
packages/opentelemetry-plugin-fetch/test/fetch.test.ts:      masterResource[key] = masterResource[key] + 30;
packages/opentelemetry-plugin-fetch/test/fetch.test.ts:  return masterResource;
packages/opentelemetry-plugin-fetch/test/fetch.test.ts:      createMasterResource({
packages/opentelemetry-plugin-xml-http-request/test/xhr.test.ts:function createMasterResource(resource = {}): PerformanceResourceTiming {
packages/opentelemetry-plugin-xml-http-request/test/xhr.test.ts:  const masterResource: any = createResource(resource);
packages/opentelemetry-plugin-xml-http-request/test/xhr.test.ts:  Object.keys(masterResource).forEach((key: string) => {
packages/opentelemetry-plugin-xml-http-request/test/xhr.test.ts:    if (typeof masterResource[key] === 'number') {
packages/opentelemetry-plugin-xml-http-request/test/xhr.test.ts:      masterResource[key] = masterResource[key] + 30;
packages/opentelemetry-plugin-xml-http-request/test/xhr.test.ts:  return masterResource;
packages/opentelemetry-plugin-xml-http-request/test/xhr.test.ts:            createMasterResource({
packages/opentelemetry-plugin-xml-http-request/test/xhr.test.ts:                'https://raw.githubusercontent.com/open-telemetry/opentelemetry-js/master/package.json',
packages/opentelemetry-plugin-xml-http-request/test/xhr.test.ts:                'https://raw.githubusercontent.com/open-telemetry/opentelemetry-js/master/package.json'
packages/opentelemetry-plugin-xml-http-request/test/xhr.test.ts:          'https://raw.githubusercontent.com/open-telemetry/opentelemetry-js/master/package.json';

Note: other non-inclusive language remains as a result of master terminology on branches.

Describe the solution you'd like

Non-inclusive language removed from tests

[dyladan]

Any reason to limit this to just tests?

[dyladan]

Fixed in #1500