PROTON-1944: update versions for 0.27.0-rc1

Author: gemmellr

VERSION.txt

@@ -1 +1 @@
-0.27.0-SNAPSHOT
+0.27.0

python/docs/conf.py

@@ -41,7 +41,7 @@
 
 # General information about the project.
 project = u'Apache Qpid Proton'
-copyright = u'2015, Apache Qpid'
+copyright = u'2015-2019, Apache Qpid'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -50,7 +50,7 @@
 # The short X.Y version.
 version = '0.27.0'
 # The full version, including alpha/beta/rc tags.
-release = '0.27.0-SNAPSHOT'
+release = '0.27.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.