Artem Bilan 6b6a38f8cb INT-4017: Fix If-None-Match HTTP header tests ...

JIRA: https://jira.spring.io/browse/INT-4017

According RFC 7232 (https://tools.ietf.org/html/rfc7232#section-2.3) the ETag headers must be in the pattern:
```
ETag       = entity-tag

     entity-tag = [ weak ] opaque-tag
     weak       = %x57.2F ; "W/", case-sensitive
     opaque-tag = DQUOTE *etagc DQUOTE
     etagc      = %x21 / %x23-7E / obs-text
                ; VCHAR except double quotes, plus obs-text
```
Therefore the regexp like `HttpHeaders.ETAG_HEADER_VALUE_PATTERN`

2016-04-28 20:00:06 -04:00

..

main

Some various upgrades, fixes and refactoring

2016-04-25 23:32:14 -04:00

test

INT-4017: Fix If-None-Match HTTP header tests

2016-04-28 20:00:06 -04:00