Resolves issue with proxy-redirect nginx configuration

Resolves an issue where the proxy-redirect annotations were not generating the
correct configuration possibly because of user error. This is done by only
setting the proxy_redirect if both proxy-redirect-from and proxy-redirect-to
have valid values. Also adds the e2e tests.

Fixes #2074

internal/ingress/controller/config/config.go

@@ -604,6 +604,7 @@ func NewDefault() Configuration {
 			ProxyNextUpstreamTries: 0,
 			ProxyRequestBuffering:  "on",
 			ProxyRedirectFrom:      "off",
+			ProxyRedirectTo:        "off",
 			SSLRedirect:            true,
 			CustomHTTPErrors:       []int{},
 			WhitelistSourceRange:   []string{},