Attempt to fix 'trigger characters' issue.

- modify textmate grammars so that interesting contexts count
  as 'identifiers'.
- disable trigger chars on vscode

The effect of this is that vscode auto-triggers completions even
without trigger characters.

vscode-extensions/vscode-spring-boot/scripts/preinstall.sh

@@ -9,7 +9,10 @@ npm install ../commons-vscode/*-commons-vscode-*.tgz
 
 # Copy grammar files for .properties and .yml format
 curl https://raw.githubusercontent.com/textmate/yaml.tmbundle/master/Syntaxes/YAML.tmLanguage > yaml-support/yaml.tmLanguage
+sed -i -e 's/string\./identifier\./g' yaml-support/yaml.tmLanguage
+
 curl https://raw.githubusercontent.com/textmate/java.tmbundle/master/Syntaxes/JavaProperties.plist > properties-support/java-properties.tmLanguage
+sed -i -e  's/constant/identifier/g' properties-support/java-properties.tmLanguage
 
 # Clean old jars
 rm -fr ${workdir}/jars