Add fix instructions into error message for Helm installer

Signed-off-by: Mykola Morhun <mmorhun@redhat.com>

src/tasks/installers/helm.ts

@@ -77,12 +77,13 @@ export class HelmTasks {
         task: async (ctx: any, task: any) => {
           const cheTlsSecret = await this.kubeHelper.getSecret(CHE_TLS_SECRET_NAME, flags.chenamespace)
 
+          const fixErrorMessage = 'Helm installer generates secrets automatically. To fix the problem delete existed secrets in dedicated for Eclispe Che namespace and rerun the command.'
           if (cheTlsSecret && cheTlsSecret.data) {
             if (!cheTlsSecret.data['tls.crt'] || !cheTlsSecret.data['tls.key']) {
-              throw new Error('"che-tls" secret is found but it is invalid. The valid self-signed certificate should contain "tls.crt" and "tls.key" entries.')
+              throw new Error('"che-tls" secret is found but it is invalid. The valid self-signed certificate should contain "tls.crt" and "tls.key" entries. ' + fixErrorMessage)
             }
             if (flags['self-signed-cert'] && !cheTlsSecret.data['ca.crt']) {
-              throw new Error(`"ca.crt" should be present in ${CHE_TLS_SECRET_NAME} secret in case of using self-signed certificate with helm installer.`)
+              throw new Error(`"ca.crt" should be present in ${CHE_TLS_SECRET_NAME} secret in case of using self-signed certificate with helm installer. ${fixErrorMessage}`)
             }
 
             ctx.cheCertificateExists = true