RFR(S): 8067173: remove Utils::fileAsList

[Tatiana Pivovarova]

Hi all,

please review this small patch

bugid: https://bugs.openjdk.java.net/browse/JDK-8067173
webrevs:
- 
http://cr.openjdk.java.net/~iignatyev/tpivovarova/8067173/hotspot/webrev.00/
- http://cr.openjdk.java.net/~iignatyev/tpivovarova/8067173/jdk/webrev.00/

Problem:
Utils::fileAsList is almost a copy of Files::readAllLines

Solution:
Replace Utils::fileAsList by Files::readAllLines

Testing: jprt

Thanks,
Tatiana