(MODULES-6981) Do not try to read ~root/.my.cnf when calling "mysqld -V" (#1063)

* (MODULES-5618) Do not try to read ~root/.my.cnf when calling "mysqld -V"

Author: simondeziel

Diff for: lib/facter/mysqld_version.rb

@@ -1,5 +1,5 @@
 Facter.add('mysqld_version') do
   setcode do
-    Facter::Util::Resolution.exec('mysqld -V 2>/dev/null')
+    Facter::Util::Resolution.exec('mysqld --no-defaults -V 2>/dev/null')
   end
 end

Diff for: spec/unit/facter/mysqld_version_spec.rb

@@ -8,7 +8,7 @@
   describe 'mysqld_version' do
     context 'with value' do
       before :each do
-        Facter::Util::Resolution.stubs(:exec).with('mysqld -V 2>/dev/null').returns('mysqld  Ver 5.5.49-37.9 for Linux on x86_64 (Percona Server (GPL), Release 37.9, Revision efa0073)')
+        Facter::Util::Resolution.stubs(:exec).with('mysqld --no-defaults -V 2>/dev/null').returns('mysqld  Ver 5.5.49-37.9 for Linux on x86_64 (Percona Server (GPL), Release 37.9, Revision efa0073)')
       end
       it {
         expect(Facter.fact(:mysqld_version).value).to eq('mysqld  Ver 5.5.49-37.9 for Linux on x86_64 (Percona Server (GPL), Release 37.9, Revision efa0073)')