Add empty string and file tests to import key test case
Add empty string and file tests to import key test case


git-svn-id: 238cecb930ce893fc9dbb348c2faf7e702d02354@266691 c90b9560-bf6c-de11-be94-00142212c4b1

gauthierm/Crypt_GPG,alecpl/Crypt_GPG,pear/Crypt_GPG,pear/Crypt_GPG