Remove traces of remote_file from unit tests and .fixtures.yml

When remote_file got replaced by archive [1] the unit tests were not updated accordingly.

Removes errors.
rspec ./spec/defines/ca_spec.rb:141 # ca_cert::ca os-dependent items On Debian based systems with a remote certificate is expected to contain Remote_file[/usr/local/share/ca-certificates/Globalsign_Org_Intermediate.crt] with ensure => "present" and source => "http://secure.globalsign.com/cacert/gsorganizationvalsha2g2r1.crt"
rspec ./spec/defines/ca_spec.rb:202 # ca_cert::ca os-dependent items On RedHat based systems with a remote certificate is expected to contain Remote_file[/etc/pki/ca-trust/source/anchors/Globalsign_Org_Intermediate.crt] with ensure => "present" and source => "http://secure.globalsign.com/cacert/gsorganizationvalsha2g2r1.crt"
rspec ./spec/defines/ca_spec.rb:246 # ca_cert::ca os-dependent items On RedHat based systems when explicitly distrusting a certificate is expected to contain Remote_file[/etc/pki/ca-trust/source/blacklist/Globalsign_Org_Intermediate.crt] with ensure => "present" and source => "http://secure.globalsign.com/cacert/gsorganizationvalsha2g2r1.crt"
rspec ./spec/defines/ca_spec.rb:273 # ca_cert::ca os-dependent items On Suse 11 based systems with a remote certificate is expected to contain Remote_file[/etc/ssl/certs/Globalsign_Org_Intermediate.pem] with ensure => "present" and source => "http://secure.globalsign.com/cacert/gsorganizationvalsha2g2r1.pem"
rspec ./spec/defines/ca_spec.rb:347 # ca_cert::ca os-dependent items On Suse 12 based systems with a remote certificate is expected to contain Remote_file[/etc/pki/trust/anchors/Globalsign_Org_Intermediate.crt] with ensure => "present" and source => "http://secure.globalsign.com/cacert/gsorganizationvalsha2g2r1.crt"
rspec ./spec/defines/ca_spec.rb:393 # ca_cert::ca os-dependent items On Suse 12 based systems when explicitly distrusting a certificate is expected to contain Remote_file[/etc/pki/trust/blacklist/Globalsign_Org_Intermediate.crt] with ensure => "present" and source => "http://secure.globalsign.com/cacert/gsorganizationvalsha2g2r1.crt"

[1] #69

.fixtures.yml

@@ -1,7 +1,6 @@
 fixtures:
   repositories:
     stdlib: "https://github.com/puppetlabs/puppetlabs-stdlib.git"
-    remote_file: "https://github.com/lwf/puppet-remote_file.git"
     puppet_archive: "https://github.com/voxpupuli/puppet-archive.git"
   symlinks:
     ca_cert: "#{source_dir}"

spec/defines/ca_spec.rb

@@ -138,7 +138,7 @@
         end
 
         it {
-          is_expected.to contain_remote_file(DEBIAN_CA_FILE).with(
+          is_expected.to contain_archive(DEBIAN_CA_FILE).with(
             'ensure' => 'present',
             'source' => HTTP_URL,
           )
@@ -199,7 +199,7 @@
         end
 
         it {
-          is_expected.to contain_remote_file(REDHAT_CA_FILE).with(
+          is_expected.to contain_archive(REDHAT_CA_FILE).with(
             'ensure' => 'present',
             'source' => HTTP_URL,
           )
@@ -243,7 +243,7 @@
         end
 
         it {
-          is_expected.to contain_remote_file(DISTRUSTED_REDHAT_CA_FILE).with(
+          is_expected.to contain_archive(DISTRUSTED_REDHAT_CA_FILE).with(
             'ensure' => 'present',
             'source' => HTTP_URL,
           )
@@ -270,7 +270,7 @@
         end
 
         it {
-          is_expected.to contain_remote_file(SUSE_11_CA_FILE).with(
+          is_expected.to contain_archive(SUSE_11_CA_FILE).with(
             'ensure' => 'present',
             'source' => SUSE_11_HTTP_URL,
           )
@@ -344,7 +344,7 @@
         end
 
         it {
-          is_expected.to contain_remote_file(SUSE_12_CA_FILE).with(
+          is_expected.to contain_archive(SUSE_12_CA_FILE).with(
             'ensure' => 'present',
             'source' => HTTP_URL,
           )
@@ -390,7 +390,7 @@
         end
 
         it {
-          is_expected.to contain_remote_file(DISTRUSTED_SUSE_12_CA_FILE).with(
+          is_expected.to contain_archive(DISTRUSTED_SUSE_12_CA_FILE).with(
             'ensure' => 'present',
             'source' => HTTP_URL,
           )